Global Clean Air

Air Tracker expands to Rio de Janeiro, helping officials enforce air quality standards

  • EDF's Sergio Sanchez unveils Air Tracker for Rio de Janeiro at the U20 Mayors Summit in Rio de Janeiro on November 15, 2024. Photo by Alex Franco for Environmental Defense Fund.
    EDF's Sergio Sanchez unveils Air Tracker for Rio de Janeiro at the U20 Mayors Summit in Rio de Janeiro on November 15, 2024. Photo by Alex Franco for Environmental Defense Fund.

What’s new: At the Urban 20 Mayors (U20) Summit, Environmental Defense Fund announced the expansion of Air Tracker—its cutting-edge air quality monitoring tool—to Rio de Janeiro today. Air Tracker is an interactive, real-time mapping tool that uses trusted scientific models to track air pollution sources accurately. It combines air pollution and weather forecasting to reveal not only which pollutants are in the air but also where they originate. Learn more about Air Tracker in this short explainer video.

Actions to lower air pollution in Brazil’s major cities can bring significant health benefits. According to the World Health Organization, around 61,000 Brazilians die prematurely each year due to current air pollution levels. Air Tracker will provide valuable insights to national and city officials as they implement Brazil’s new air quality law, enacted earlier this year, which aims to help 216 million Brazilians breathe cleaner air by 2030. Air Tracker is free and publicly available and can therefore also empower residents to identify polluters in their communities and flag them for regulators.

What they’re saying: Officials at the national and state levels expressed enthusiasm about the potential of Air Tracker to assist them in their efforts to cut pollution in urban and rural areas alike. “We are excited to incorporate the advanced capabilities of the Air Tracker into our pollution management toolkit,” said Rafael Barbosa Campos, Air Quality manager of the Rio de Janeiro State Environment Agency. “This technology will allow us to identify sources more quickly and accurately, in addition to strengthening collaboration with communities to reduce emissions at the source. It will help ensure cleaner air and better health for our residents.”

“The implementation of Air Tracker in Brazilian cities is a major step, directly benefiting millions of residents and setting a model for improving urban air quality across Brazil and beyond,” added Brazil’s National Secretary of Urban Environment, Adalberto Maluf. “Nationally, it also brings new potential to monitor rural areas, tracking wildfire smoke and pollution sources in critical regions like the Amazon.”

How does Air Tracker work? When users drop a pin on Air Tracker’s map, it visualizes data on some key measures:

  • Local air pollution levels (currently PM2.5 and PM10)
  • Key areas where sources are likely located
  • The path pollution travels, based on wind speed and direction

Air Tracker provides both real-time and historical data, allowing users to look back up to 6 months to understand long-term trends or the impact of specific polluting events such as wildfires, intentional burning or industrial accidents. Its unified data view provides metrics for informed decision-making, while its capabilities allow for quick responses to pollution spikes.

With support from the Clean Air Fund and the Breathe Cities Program, Air Tracker empowers city and national governments by helping them identify pollution hotspots, enforce regulations in a more targeted way and engage communities in safeguarding public health and the climate. Today’s launch in Rio de Janeiro expands Air Tracker internationally for the first time—an expansion that is expected to continue with the addition of São Paulo in the coming weeks.

What’s next? Environmental Defense Fund is currently partnering with officials in Rio de Janeiro to provide training on Air Tracker’s capabilities and how to best integrate the tool to support their monitoring and enforcement systems. Key partners include:

  • The Ministry of Environment and Climate Change of Brazil
  • Rio de Janeiro’s Instituto Estadual de Ambiente (INEA)
  • The Secretaria Municipal de Ambiente da Cidade (SMAC)
  • The State of São Paulo Environmental Company (CETESB)
  • Civil society organizations and academia.

EDF’s Senior Policy Director of Global Clean Air, Sergio Sánchez, expressed gratitude to city leaders. “We’re excited to partner with officials and communities in Brazil to launch Air Tracker, empowering residents to understand their local air quality and hold polluters accountable. This is a key step toward scaling clean air solutions, strengthening regulations and advancing public health for all.”

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Six ways to ramp up climate and clean air action in 2025

Six ways to ramp up climate and clean air action in 2025

2024 has been a significant year for the climate and air pollution crisis, both in terms of the mounting impacts and increased action. Extreme climate events like hurricanes and wildfires devastated communities around the world, forcing the issue to the forefront of public consciousness. Meanwhile countries, companies and communities took some noteworthy actions to track and reduce emissions, including major commitments made at COP28 to cut methane followed by the launch of MethaneSAT and the first UN resolution on clean air.

Climate change and air pollution are dual challenges that severely impact our health and as such must be solved together.

EDF together with the Climate and Clean Air Coalition (CCAC) and Stockholm Environment Institute (SEI) convened cross-sector clean air leaders to discuss how we can take an integrated approach to cutting greenhouse gases and air pollutants to protect human health. Together, we took stock of how far we’ve come, assessed some hard truths and identified the biggest opportunities in front of us to secure meaningful wins. The conversation captured some important learnings in the struggle to accelerate clean air and climate action that help point towards a pathway forward. Here are six takeaways.

1. Investments in data and research are paying off

Dr. Maria Neira, Director of the Public Health, Environment and Social Determinants of Health Department of the World Health Organization, shared how she has been encouraged by a shift in the recent global pollution dialogue away from merely describing the problem and toward building solutions. We know that research and monitoring efforts, some of which EDF has led, have been essential to understanding the source and impacts of pollution and to identifying solutions. The dialogue shift described by Dr. Neira suggests those efforts are starting to pay off as governments and companies are using pollution insights to identify solutions.

2. Cutting emissions takes resources and capacity

Global air pollution mitigation is severely underfunded, a crucial issue explored more below. But Martina Otto, head of UNEP’s CCAC, emphasized that governments need technical assistance as much as funding to help them set-up and maintain air quality monitoring systems that can enable effective enforcement, track clean air actions and identify new pollution sources.

This was echoed by Brazil’s National Secretary of Urban Environment, Adalberto Maluf, who outlined his country’s current efforts to implement air pollution standards including upgrading the national air quality monitoring network. The CCAC’s Clean Air Flagship, launched earlier this year, is a meaningful step toward meeting this need by mobilizing funds and fostering a community of practice where countries can learn from each other and share resources through the Air Quality Management Exchange.

3. We need to get better at tailoring our messaging

During her remarks, Valerie Hickey, Global Director for Environment, Natural Resources and Blue Economy at the World Bank, called for a fresh look at how we communicate about air pollution and its health risks, especially to those most affected. She gave an example of a farmer in Northern India who continues to engage in agricultural burning in full knowledge of the health risks, because he also knows that without it, he couldn’t earn enough to sustain his family.

In a second example, Hickey described a health minister who is told that every $1 she invests in cleaner air returns $9 in health benefits. While the Minister knows this is true in the long term, she has several more urgent needs where the $1 she has can return $2 or $3 right away. Throw in the pressure to deliver before a coming election—what would you do? Making the case for avoided loss doesn’t often move the policy or political decision maker. “We have to find the message that meets the person we’re speaking to,” concluded Hickey.

4. Companies are stepping up to track their emissions and implement reduction plans. More need to follow suit.

Many countries and some companies are developing greenhouse gas inventories to support plans to cut emissions and meet net zero goals. But few have integrated air pollutants into these assessments to address the tradeoffs and synergies. That’s why SEI created a guide to help companies track climate and air pollution emissions across their supply chains and design plans to reduce them. Research Associate in the Air Pollution Group, Eleni Michalopoulou, explained how SEI is partnering with Inter IKEA group, a member of the World Economic Forum’s Alliance for Clean Air, to do just that.

With SEI’s help, IKEA recently established a goal and detailed plan to reduce the company’s climate emissions by 50% by 2030. According to IKEA’s Head of Climate and Air Quality, Sriram Rajagopal, the company is evaluating its entire supply chain, from raw materials to product production, shipping and even end of life disposal. He says IKEA is on track to meet its goal and maybe even exceed it on key air pollutants such as PM2.5, black carbon, nitrogen oxides (NOx) and sulfur dioxide (SOx).

5. Some countries have already made great strides, and more are stepping up

Angela Churie Kallhauge, EDF’s Executive Vice President for Impact, opened the event by describing the immense progress that the city of Beijing has made on air pollution in recent years, going from smog to blue skies in little more than a decade. This example demonstrates the potential to cut pollution and drastically improve health in a short time frame as we continue to decarbonize. This is a differentiator for clean air action that our community can do a better job to highlight for leaders and funders.

We also learned about how Brazil has been taking significant steps to cut pollution. Sec. Maluf shared how the country recently approved its first ever national air quality program, which will commission a detailed emissions inventory, improve its national monitoring network and tighten air quality standards. EDF is assisting Brazil’s government in this effort by advising on the new standards, developing an integrated approach to managing climate and air pollutants and expanding our Air Tracker tool to its two largest cities, São Paulo and Rio de Janeiro.

6. Air quality funding isn’t likely to surge any time soon – it’s time to get creative

Jane Burston, CEO of the Clean Air Fund (CAF) brought another dose of reality to the conversation by sharing the results of CAF’s latest State of Global Air Quality Funding Report: Global financing for air quality projects saw a tiny increase in recent years, but remains dismally low at about 1% of global development and 2% of public climate funds. Burston echoed an important point made by Hickey from the World Bank: Air quality is unlikely to see a dramatic funding boost anytime soon, so we must find more creative ways to reallocate or repurpose money that’s already available to maximize benefits for clean air, climate and health. Both speakers shared a few thoughts for how to do this, including repurposing agricultural subsidies, providing seed funding to de-risk private sector investments, and strengthening our case to the philanthropic sector.

What’s next: This conversation brought a grounded optimism to the real progress we can make to tackle the global air pollution crisis. While low funding remains our greatest challenge, our messaging about the scope and urgency of the problem has broken through to countries, communities and increasingly companies around the world. Now it is incumbent upon us to translate what we know into meaningful, tailored stories and to focus on metric-driven solutions that can help redirect existing resources to deliver emissions reductions. By taking these next steps while approaching air pollution and climate change as the interrelated problems that they are, we can deliver tangible health benefits to a more people than ever in the coming critical years.

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Cutting methane benefits health: EDF and partners set action-oriented research agenda in Mexico 

Dr. Veronica Southerland from EDF presents on the need for updated data on methane emissions and co-pollutants in Mexico, citing gaps in health studies and their role in informed decision-making. 

Dr. Veronica Southerland from EDF presents on the need for updated data on methane emissions and co-pollutants in Mexico, citing gaps in health studies and their role in informed decision-making.

What’s New: Earlier this month, Environmental Defense Fund (EDF) and the Observatorio Mexicano de Emisiones de Metano (ObMEM) hosted a seminar-workshop to co-create a research agenda for understanding the health benefits of reducing methane and related emissions from Mexico’s oil and gas sector. The seminar brought together stakeholders from government, industry and civil society, including public health and global development organizations.  

At the meeting, participants examined the public health benefits of reducing emissions, identified priority research areas and discussed strategies for translating research into actionable policy solutions. 

Why It Matters: Methane is a powerful greenhouse gas that contributes significantly to climate change. It also has detrimental health effects, largely due to its associated co-pollutants. Cutting methane is not only one of the most effective ways to combat global warming in the short term, but it also offers immediate health benefits, decreasing risk for respiratory, cardiovascular and congenital diseases.  

It is crucial that methane policies account for both climate and health benefits, particularly for communities living near oil and gas facilities. A deep understanding of the health benefits of methane reduction in the oil and gas sector is essential to catalyzing meaningful action. The forthcoming research agenda will emphasize these co-benefits, strengthening the case for more robust and urgent mitigation efforts. 

What They’re Saying: Participants in the meeting, including EDF experts, Mexican and U.S. researchers expressed the importance of linking health research to climate policy, noting how existing data on the health impacts of methane is limited and often fragmented.  

  • Dr. Veronica Southerland from EDF stressed the need for updated data on emissions and pollutants, citing gaps in health studies and their role in informed decision-making. 
  • Researchers Dr. Horacio Riojas Rodriguez, Carla Flores Lot, and Dr. Omar Amador-Muñoz discussed their projects, highlighting gaps like poor detection of harmful pollutants, adverse birth outcomes linked to Mexico’s oil and gas sector, and regional impacts of methane emissions.  

Panelists agreed that prioritizing data and research, along with enhancing the engagement of key stakeholders, could drive more effective climate and health policies. 

What’s Next: The first next step for the workshop partners will be to refine the research agenda based on the meeting’s outcomes. Partners will next organize a follow-up convening to align on a final research agenda and shared priorities, outline priority research projects that are actionable for policymakers, and consider ways to deepen impact by collaborating with Mexico’s new presidential administration on implementation. 

By focusing research efforts on most-affected populations, EDF, Obmem and other partners hope to better characterize exposure to methane and its co-pollutants and quantify health impacts. The research agenda ought to ensure that methane reduction policies are informed by robust health data and contribute to environmental and public health improvements. EDF and its partners are committed to advancing this agenda as a vital step towards integrating health considerations into climate action strategies in Mexico and beyond. 

About the Observatorio Mexicano de Emisiones de Metano (Obmem) 

OBMEM, the Mexican Methane Emissions Observatory, was created to inform and raise awareness about the negative impacts associated with methane emissions, as well as to drive action towards fulfilling international commitments and national regulations related to reducing methane emissions from the oil and gas sector. It is composed of the Mexican Climate Initiative, the Mexican Center for Environmental Law, and Nuestro Futuro A.C. 

About Environmental Defense Fund 

Environmental Defense Fund (edf.org), one of the world’s leading nonprofit environmental organizations, creates transformative solutions to the most pressing environmental problems. To achieve this, EDF links science, economics, law, and innovative partnerships. With over 3 million members and offices in the United States, China, Mexico, Indonesia, and the European Union, EDF’s scientists, economists, lawyers, and policy experts are working in 28 countries to turn our solutions into action. 

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New #WorldCleanAirDay podcast: How we’re adapting Air Tracker in the U.S., China and soon Brazil

On September 7, for the 5th International Day of Clean Air for Blue Skies, EDF is highlighting how our cutting-edge tools are advancing the fight against air pollution in a new podcast episode, hosted by our China team. Reliable data on pollution sources is crucial, and that’s why we’ve developed Air Tracker—a free online tool using the latest science to trace local pollution like never before.

Listen in to hear from three EDF experts: Tammy Thompson on how Air Tracker came about and what it can do, Ziwei Luo on how Air Tracker has been localized in a major city in China, and Sergio Sánchez  on how we’re adapting Air Tracker to be of greatest use to city and national officials in Brazil. Air Tracker is already active in the US and China and is expected to reach Brazil by year-end.

Listen to the full episode here: Adapting Air Quality Monitoring Across Regions through Air Tracker

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EDF team visits Brazil to expand Air Tracker, support clean air action

The EDF team finalizes its partnership with the Secretaria Municipal de Meio Ambiente da Cidade after a meeting with the City of Rio De Janeiro.

The EDF team finalizes its partnership with the Secretaria Municipal de Meio Ambiente da Cidade after a meeting with the City of Rio De Janeiro.

What’s new: Our recent trip to Brazil in June gave EDF the opportunity to formalize partnerships with city and state officials in Rio de Janeiro and São Paulo, as these megacities seek new ways to better track and address air pollution.

Alex Franco, Sergio Sanchez and I also met with city experts, academics and community members to discuss how Air Tracker can help these growing metro areas as they try to address persistent challenges from soot and other pollutants.

These cities pose new challenges for Air Tracker, such as integrating a global weather forecasting model for the Brazilian expansion and addressing data limitations in areas like modeling, emissions inventories and ambient air quality, but we’re looking forward to learning how we can adapt the tool to meet the needs of Brazil’s cities.

Why it matters: Most Brazilians (90%) live in cities, where air pollution levels exceed the World Health Organization’s recommendations. The Brazilian government is set to adopt a resolution in September that will establish gradually stricter standards for soot (PM2.5) and other air pollutants over the next 20 years. However, current air quality levels expose millions to unhealthy air. We hope our work there will help Brazil achieve its air quality goals to protect public health and serve as a model across the region.

The good news: Local, state, and national leaders are eager to tackle air pollution. EDF has partnered with the Ministry of Environment and Climate Change since last year to enhance regulations and enforcement plans to help reduce air pollution on a national scale.

EDF has also partnered with local authorities in Rio de Janeiro (SMAC, Rio de Janeiro’s Municipal Secretariat of Environment) and São Paulo (CETESB, the São Paulo State Environmental Agency) to deploy Air Tracker to analyze patterns in air pollution and learn how it moves through the city. This will help identify major sources and develop effective solutions. They’ve already given us a list of hotspots like industrial areas, warehouses where vehicles idle and traffic chokepoints where they feel Air Tracker can help make an impact.

Beyond that, we’re excited that local leaders are interested in connecting with community partners as well as state and health officials to build broad support for clean air solutions.

Our trip also gave us the opportunity to meet with nonprofit community leaders and academics from across Latin America at an air quality modeling conference, where Alex Franco presented on Air Tracker. These kinds of local connections will be critical as we improve Air Tracker, so it can meet the policy needs of Brazilian leaders and the residents they serve.

Go Deeper: This trip was made possible thanks to the Clean Air Fund and its generous support for the global expansion of Air Tracker. It’s also part of our ongoing efforts to reduce air pollution across Latin America and the Caribbean.

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New State of Global Air report shows pollution’s deadly impact

The Health Effects Institute’s new State of Global Air 2024 report finds that air pollution ranks as the second leading risk factor for death worldwide.

Photo credit: Belle Co

What’s new: The Health Effects Institute’s new State of Global Air 2024 report finds that air pollution ranks as the second leading risk factor for death, including for children under 5. Yes, you read that right. Air pollution is now the second leading risk factor for death, contributing to an estimated 8 million deaths in 2021. That’s more than deaths due to poor diet and even tobacco.

Why it matters: The report further sounds the global alarm bell on the devastating health impacts of air pollution, contributing to heart disease, stroke, diabetes, lung cancer and chronic obstructive pulmonary disease (COPD). It analyzes air quality data and health impacts globally and details exposure levels and related health impacts of nitrogen dioxide (NO2), which is associated with vehicle traffic, a major global source of both poor air pollution and greenhouse gases.

Our take: While sounding a critical alarm bell on the urgency of this issue, the report also provides insights into where to focus solutions. Here are my top takeaways:

  1. The hardest hit are the oldest and youngest. Long-term exposure to PM 2.5 contributes to diseases including heart disease, lung cancer, chronic obstructive pulmonary disease (COPD), stroke, type 2 diabetes, lower respiratory infections and adverse birth outcomes that disproportionally impact the elderly and young. We need to target health prevention, education and emission reduction strategies to better protect these sensitive populations.
  2. There are disparities between nations. Populations from low- and middle-income countries are exposed to 1.3-4 times as much PM 2.5., and countries in South Asia and Africa face the highest disease burden. We need to direct the resources where the problem is greatest. Yet, according to the 2023 State of the Global Air Quality Funding report by the Clean Air Fund, only 1% of international development funding went towards air quality over the past 6 years. And from 2017-2021, the entire continent of Africa received only 5% of the total funding for air quality. The gravity of the air pollution health crisis demands a far deeper global investment given the tremendous health care costs of air pollution—which the World Bank has estimated at $8 trillion or 6% of global GDP.
  3. Climate change is making this worse. Many sources of air pollution also emit greenhouse gases, like tailpipe emissions from vehicles, worsening air quality as they warm the planet. Climate change intensifies droughts, contributing to severe wildfires and dust storms that increase fine particle pollution. Meanwhile, more frequent heat waves enable pollutants like nitrogen oxides to speed the formation of harmful ozone, exposure to which is increasing in many regions. The report underscores the connection between the climate crisis and its toll on human health. The connection between air pollution and climate change requires an integrated approach when assessing the benefits and costs of climate mitigation solutions, from reducing emissions from oil and gas operations to increasing public transit and switching to renewable energy sources.
  4. There is some good news. PM 2.5 levels seem to be stabilizing in some regions, and the disease burden from household air pollution has decreased. Further, there is progress in expanding the ability to measure and monitor air quality, especially in parts of the globe where little to no air quality monitoring was available on the ground. Understanding the sources and impacts of pollution at the local and regional scale is a critical step needed to better tackle harmful emissions.

The report points to progress in Senegal, South Africa, Morocco and Rwanda, where they are taking meaningful steps toward understanding local emissions and are improving their air quality monitoring networks. EDF is a partner in the Clean Air Catalyst program that is working in Nairobi, Kenya, Indore, India and Jakarta, Indonesia to expand air monitoring and management capacity and build partnerships to tackle significant sources of pollution, including that from transportation.

The State of the Global Air report is an important contribution to the global effort for clean air, providing robust analyses that indicate the severity of the problem and help inform where resources and solutions must be directed.

Air pollution is a global health crisis, and we have the solutions today that can improve the lives of millions and accelerate climate action.

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Collaborative insights: Empowering health advocacy on methane in Mexico

A panel discussion hosted by the Centro Mexicano de Derecho Ambiental (CEMDA) on the Health impacts of the oil and gas sector on communities across Mexico. Photo by Veronica Southerland.

A panel discussion hosted by the Centro Mexicano de Derecho Ambiental (CEMDA) on the health impacts of the oil and gas sector on communities across Mexico. Photo by Veronica Southerland.

What’s new: EDF’s Global Clean Air team was proud to launch the Sall Methane and Health project in March of 2024, a new collaboration funded by the Sall Family Foundation to track the health impacts of methane emitted by the oil and gas industry in Mexico. Key partners in the project include:

  • The Centro Mexicano de Derecho Ambiental (CEMDA), a civil society organization that works to strengthen legal protections for the environment in Mexico.
  • El Observatorio Mexicano de Emisiones de Metano (Obmem), a coalition that advances national and global agreements to reduce methane emissions in the oil and gas industry.

At the launch, EDF and CEMDA connected with community groups and journalists, highlighting relevant EDF findings about methane emissions in Mexico. One such finding is that methane emissions could be up-to 2.5 times higher than reported by government sources.

Why it matters: By raising awareness, fostering collaborations with diverse stakeholders and building rapport with impacted communities, policymakers and journalists in Mexico, EDF is not only enhancing scientific knowledge of methane’s impacts but also laying the groundwork for concrete policies aimed at addressing environmental and health concerns.

The details: The March 13 panel presentation with CEMDA titled “¿Huellas invisibles? Cómo impacta el metano a las comunidades,” shed light on methane’s effects on communities. Sergio Sánchez and Veronica Southerland presented on methane sources, EDF’s past research work and forthcoming efforts to highlight health impacts and strengthen methane regulations.

The EDF team also met with CEMDA and Obmem, who were instrumental in solidifying diverse cross-sector partnerships for the project. Discussions revolved around project goals, potential roles, and the formulation of a $50,000 subgrant that would enable CEMDA to convene Mexican methane policy experts to help build consensus and momentum toward solutions.

What’s next: As the project gets underway, key focus areas will include:

  • Disproportionate impacts on vulnerable demographics like women and children
  • Replicating previous US studies in Mexico
  • Expanding research avenues to encompass broader air pollutant attributable health burden studies in Mexico.

As the project moves forward, strengthening collaboration between EDF, CEMDA, Obmem and other groups will prove pivotal in shaping future insights generated and policy solutions. The EDF team will continue to share updates on the Sall Methane and Health project here on the Global Clean Air blog as they unfold—stay tuned!

Veronica Southerland is an environmental health scientist with expertise in the health impacts of air pollution.

Learn more about the health impacts of methane here

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Mobile monitoring reveals congestion effect for vehicle emissions in London

University of York mobile laboratory for measuring ambient air pollution.

University of York mobile laboratory for measuring ambient air pollution (Photo taken by Shona Wilde).

New study shows just how much congestion intensifies emissions from diesel vehicles  

In a recently published study, researchers from the University of York and Environmental Defense Fund show how traffic exacerbates nitrogen oxide (NOx) pollution from road vehicles, in particular from intense emitters like diesel trucks and buses, pointing to solutions that can bring an outsize benefit to air quality.  

Comparing pollution with targeted monitoring  

EDF and York designed a study that measured air pollution along two distinct routes in the London metropolitan area—one that was extremely congested in Central London and the other farther from the city center where drivers experience more free-flowing conditions including some highway driving. The Central London route was identified as a pollution hotspot in the Breathe London Pilot project, which provided motivation for the new targeted study.  

Using York’s mobile monitoring laboratory equipped with fast-response instruments, we collected ambient measurements of both NOx and Carbon Dioxide (CO2) for two weeks along the two different routes to quantify the emission intensity of the London fleet, which included a wide range of vehicle types driving in both heavy congestion and light-traffic conditions. We also used dashboard video recordings to identify which specific vehicle types were the likely cause of hotspots.  

Using the latest analysis methods, we mapped the spatial patterns of persistent emission sources, while simultaneously revealing the attributes of the most significant emitters within the vehicle fleet. We found that NOx emissions were a factor of two times higher for fleets with a high proportion of diesel vehicles operating in congested driving conditions, and a factor of five times higher for intense emitters like SCR-retrofit diesel buses and heavy goods vehicles in stop-and-go traffic. 

We then compared our data to an existing database of measurements from remote sensors, which measure vehicle emissions more directly at the tailpipe, to verify our ambient data against an established reference. The comparison further demonstrated the congestion effect whereby fleets predominately composed of vehicles rated with the highest emission standards (Euro 6/VI) generated NOx pollution that would be expected from a fleet of lower standard vehicles (Euro 2/II-5/V), when impacted by high traffic. 

Our new approach allowed us to focus on the emission intensity of both the overall fleet and specific high-emitting vehicles and make comparisons to established measurements of real-world emissions. The results provided greater insight than standard measurements solely focused on total ambient concentrations.  

Real-time, high-frequency air pollution measurements.

Real-time, high-frequency air pollution measurements. (Photo taken by Shona Wilde)

New methods increase understanding with fewer resources 

Beyond illustrating the impact congestion has on emission intensity, the study shows the feasibility of extracting valuable insights from reasonably short mobile monitoring campaigns. Compared to previous large-scale studies, such as the ~1-year long Breathe London mobile study, this campaign was less resource intensive, requiring just two weeks of driving and reducing vehicle and instrument maintenance. This campaign simplified field logistics and increased the efficiency of the data analysis. The new method could also prove useful to scientists and policy makers who want to learn more about local fleet emissions under a variety of traffic conditions in places that aren’t currently well-monitored. Mobile monitoring provided a continuous picture of emissions along a route, not limited to individual locations like stationary monitors.  

This approach offers policy makers a new way to spot specific vehicle types and conditions that produce greater emission intensity, so they can develop targeted interventions and monitor progress over time in a cost-effective manner.  

While there is no substitute for knowing the exact vehicle emitting pollution, as one might find using remote sensing, this new technique provides useful information in places where remote sensing is either impossible or impractical. It’s also especially useful when exploring the impacts of congestion, as remote sensing is not well suited for stop-and-go traffic.  

While the project focused on London, the methods and insights developed can be useful for other cities, particularly those where there are diesel vehicles operating in heavy traffic. 

Practical policy applications 

Because this method identifies the effects of the highest-polluting vehicles in the most congested areas, it gives local transportation officials a clear roadmap to develop the most impactful solutions.  

The adverse effect of congestion on tailpipe emissions can be eliminated with the transition to electric vehicles, which has added benefits for the climate, especially for heavy-duty diesel trucks and buses. Officials could also consider introducing solutions like restricting operating hours for these vehicles in high-traffic areas or creating bus lanes, both of which could ease congestion. The approach could help determine which city-owned vehicles need to come in for maintenance to restore performance of aging exhaust aftertreatment technology. 

In cities that already implement clean air zones and technology retrofit programs, air quality can improve even further if high congestion can be better addressed in places where diesel vehicles operate. In London, where the ULEZ has already helped reduce ambient Nitrogen Dioxide (NO2) concentrations, accelerating replacement of the most potent polluters with electric vehicles, starting with the most congested routes, would provide additional climate, health and mobility benefits improving the driving experience for everyone. 

To learn more about the study, read the article in Atmospheric Environment: X.  

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New interactive data story highlights air pollution and health impacts in the South Bronx

South Bronx Unite's new interactive data story clearly maps the concentration of warehouses and other truck-attracting facilities in the South Bronx and other parts of New York City. It also maps the associated disproportionate health burden borne by the community, including higher childhood asthma rates.

South Bronx Unite’s new interactive data story clearly maps the concentration of warehouses and other truck-attracting facilities in the South Bronx and throughout New York City. It also maps some of the health impacts associated with the air pollution emitted by the facilities and large diesel trucks that often come with them.

What’s new: EDF partner, South Bronx Unite, has just launched an interactive data visualization that’s mapping what residents of the South Bronx have long experienced—that air pollution from industrial facilities is taking a disproportionate toll on the health of residents in their community and across New York City. For the last year, a multi-disciplinary team at EDF has been collaborating with South Bronx Unite to improve local air quality monitoring and create engaging tools that tell the stories found in monitoring data.

Why it matters: Every city relies on large industrial facilities, and New York City is no exception. Think waste transfer stations, power plants, printing facilities and warehouses that support in-time delivery services. Many of these facilities are major air polluters in the neighborhoods where they are placed. Beyond the facilities themselves, the heavy-duty vehicles that they attract, such as large delivery trucks, are among the leading polluters on the road.

What we know: For decades, South Bronx residents have faced disproportionately high air pollution and asthma rates. Leveraging recent EDF research that describes air pollution’s burden of childhood asthma, the new webpage now backs up residents’ lived experiences with even more quantitative information, presented as a narrated interactive visualization that helps tell the story.

How the work has been used: Presenting this additional data in an easy-to-understand format will help advance tangible policy change that can improve health outcomes in the South Bronx and beyond. South Bronx Unite leaders recently participated in NYC Climate Week events where they used this tool to tell the story of their air quality monitoring efforts and what they will mean for public health.

Moving forward: South Bronx Unite will continue to use the air quality and health insights from this new tool to advance their advocacy goals. They have begun working closely with the EDF New York State team to build consensus with local coalitions.

Real policy actions are already taking shape in New York that could help alleviate the health impacts of warehouses and other polluting facilities in the South Bronx and across the state. In November 2023, state lawmakers introduced the Clean Deliveries Act, which would require the state to review the negative impacts of so-called “mega-warehouses” and establish emissions reduction plans.

South Bronx Unite brings together neighborhood residents, community organizations, academic institutions and allies to improve and protect the social, environmental and economic future of the South Bronx. Learn more about their work and how you can support it at southbronxunite.org.

Also posted in Academic, Climate, Community Organizer, Concerned Citizen, Environmental Justice, Government Official/Policymaker, Homepage, Monitoring, New York City, Partners, Public Health/Environmental Official, USA / Comments are closed

EDF China unveils locally-tailored Air Tracker in Jinan

EDF China holds meeting to launch localized AirTracker tool in Jinan in November, 2023

EDF China holds meeting to launch localized Air Tracker tool in Jinan in November, 2023. Photo courtesy of EDF China.

What’s new: EDF China recently unveiled its localized Air Tracker tool at a meeting with government officials and policy and academic experts in Jinan. The tool will help these and other policymakers to track and mitigate air pollution in support of China’s carbon peaking and carbon neutrality goals.

What is Air Tracker?: Air Tracker is an innovative air quality monitoring tool developed by EDF, the University of Utah and the CREATE Lab at Carnegie Mellon University that uses real-time, trusted scientific models to help users see where air pollution is coming from. The tool is currently operational in five U.S. cities, with plans to expand globally.

To adapt Air Tracker’s technology for use in China, EDF China collaborated with the Chinese Academy of Environmental Planning and Tsinghua University on joint research projects in Jinan, a city with more than 9 million residents. Jinan was an ideal location to deploy the technology in part because it has an urgent need to further reduce air pollution levels. Concentrations of fine particles (PM2.5), sometimes called soot, stood at 40 μg/m3 in Jinan in 2022. These exceed China’s national standards (35 μg/m3), which are 7 times weaker than the World Health Organization’s recommended limits (5 μg/m3).

What we know: Tsinghua University developed a monitoring approach that utilizes meteorological, emission and observational data from monitoring stations, which complements Air Tracker. By incorporating both approaches, the new, localized Air Tracker tool will pinpoint pollution sources and inform targeted control

Why it matters: This new tool allows users to quantify the contributions of different emission sources through near-real-time data collection. This will allow government officials to develop targeted control measures to reduce air pollution and carbon emissions.

Both China and the United States have committed to jointly addressing the climate crisis. The newly localized Air Tracker tool is an example of the ways the two countries plan to promote policies and technologies that control greenhouse gas emissions and air pollution.

Next steps: EDF China and our partners—including the Tsinghua University, Chinese Academy of Environmental Planning and Jinan Environmental Research Academy—will test the localized Air Tracker this winter in Jinan. The team also will seek input from key government partners who were present at the launch, including the Ministry of Ecology and Environment of China (MEE) and the Jinan Municipal Ecology and Economic Bureau.

The lessons learned from this pilot phase will provide valuable insights to other cities in the Global South who may also benefit from Air Tracker or similar technologies. The learnings will likely also inform future expansions of the tool to other cities in China and around the world.

Learn more about EDF’s Air Tracker tool at globalcleanair.org/AirTracker.

Also posted in Academic, China, Climate, Energy, Environmental Justice, Government Official/Policymaker, Homepage, Monitoring, Public Health/Environmental Official / Comments are closed