By Ben Hmiel and Jon Goldstein
After three years of actively collecting methane emissions data in the Permian Basin, researchers have gained new insights that will make it easier to reduce emissions of the incredibly potent greenhouse gas methane. These insights are helping inform state and federal regulatory approaches at a critical time.
After decades of sailing under the radar, international shipping and its climate impact is gradually getting more attention from other actors than just environmental non-governmental organizations. The shift has also been obvious at the most recent UN Climate Change Conferences.
By: Jason Mathers and Peter Zalzal
The U.S. made an important commitment at COP27 yesterday that will help reduce climate and air pollution from the dirtiest vehicles on our roads and create a foundation for more ambitious action, which is urgently needed to reduce pollution from trucks and buses.
Joining sixteen nations — as well as several states and cities around the world — Secretary Granholm added the U.S. as a signatory to the Global Memorandum of Understanding on Zero-Emission Medium- and Heavy-Duty Vehicles. This commits the U.S. to a goal of 100% zero-emission truck and bus sales by 2040, with an interim goal of 30% new sales by 2030. The global MOU was initiated by CALSTART at COP26 in 2021.
Methane plume detected on a gathering pipeline during 2021 survey.
By Erin Murphy and Jevan Yu
Methane emissions from natural gas gathering pipelines in the U.S. Permian Basin are at least 14 times greater than Environmental Protection Agency national inventory estimates, according to new peer-reviewed research from EDF, Stanford University and the University of Arizona. Gathering lines transport unprocessed gas from well sites to processing facilities and vary widely in size and pressure, with diameters ranging from two inches to as large as 30 inches. Methane is a potent greenhouse gas with over 84 times the warming potential of carbon dioxide over its first 20 years in the atmosphere, and this new research indicates the importance of finding and fixing pipeline methane leaks to mitigate the climate crisis.
A new study out today in the journal Science finds that climate-warming methane emissions from flaring, the practice of burning off gas rather than capturing it for productive use, are five times higher than government estimates — primarily due to unlit and malfunctioning flares. Researchers conclude that flares are combusting at a 91% efficiency rate, significantly lower than the 98% efficiency rate that is assumed by operators and policymakers.
These findings confirm that our current environmental standards are not adequately controlling this pollution source and underline the need for urgent regulatory action from the Environmental Protection Agency and Bureau of Land Management to limit pollution and waste from flaring.
By Erin Murphy and Joe von Fischer
New peer-reviewed research reveals neighborhoods with more people of color and lower household income tended to have more gas leaks. Because natural gas is composed primarily of methane, leaks are a source of climate pollution as well as a health and safety hazard and nuisance to nearby communities. The findings demonstrate why regulators and gas utilities should be open with the public about gas leak information and ensure that leaks in disadvantaged communities are addressed equitably.
What the research tells us
Researchers analyzed gas leak location data in nine U.S. metro areas and found leak densities increased along with the percentage of people of color and with decreasing median household income. Thus, communities of color and low-income populations generally experienced more gas leaks. The study found that average leak density increases by 37% for these populations compared to predominantly white neighborhoods. Leak density — the number of leaks per mile of pipeline — also increased slightly in neighborhoods with older housing infrastructure.
