Climate 411

Bush CAFE Standards Overturned on Appeal

This post is by Vickie Patton, Deputy General Counsel at Environmental Defense.

The 9th Circuit Court of Appeals just issued a 90-page opinion overturning major aspects of the Bush administration’s flawed fuel economy standards for light-duty trucks. Sean Donahue argued the case for Environmental Defense and Susan Fiering for the California Attorney General’s office – on behalf of a larger group of state and environmental petitioners.

Among other things, the court held that the Department of Transportation (DOT):

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Posted in Cars and Pollution / Read 1 Response

To Drive Less, Live Closer to Work

The author of today’s post, Sheryl Canter, is an Online Writer and Editorial Manager at Environmental Defense.

Total greenhouse gas emissions from cars and trucks is a function of three factors: amount of driving, fuel economy, and carbon emissions per gallon of fuel (the "three-legged stool [PDF]"). The news media tend to focus on the latter two factors, but how much people drive has a huge impact.

A new report published by the Urban Land Institute says that greenhouse gas emissions cannot be reduced sufficiently by making vehicles more efficient, because growth in driving cancels out improved fuel economy. People also must drive less. And the report’s solution is not just better public transportation.

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Posted in Cars and Pollution / Read 2 Responses

A Level-Headed Look at Ethanol and the Environment

The author of today’s post, Martha Roberts, is an economist at Environmental Defense, and one of the authors of the Ogallala Aquifer study.

Today Environmental Defense released a new mini-report that analyzes how expanding ethanol production might impact the environment: Potential Impacts of Biofuels Expansion on Natural Resources: A Case Study of the Ogallala Aquifer Region [PDF].

Ethanol arouses a lot of passion in people. Our goal was to produce a report that is balanced, meticulously documented, and offers solutions to potential problems.

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Also posted in Energy / Read 1 Response

VT Court Rejects Automakers' Attempt to Continue Polluting

The author of today’s post, Jim Tripp, is General Counsel at Environmental Defense. Working with state agencies and other environmental groups, Tripp presented arguments in the Vermont trial this spring.

We won an important victory today. A federal judge in Vermont ruled against U.S. automakers’ attempt to block states from setting new rules limiting global warming pollution from automobiles. In his ruling, Judge William K. Sessions III said that the auto industry failed to prove that it could not safely meet the tailpipe standards.

A number of environmental groups joined the State of Vermont in defending the case, including us at Environmental Defense, the Conservation Law Foundation, the Sierra Club, the Natural Resources Defense Council, and the Vermont Public Interest Research Group.

So can Vermont now implement the tighter emissions requirements? Not quite yet.

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Posted in Cars and Pollution / Read 4 Responses

Fossil Fuels and Biofuels

This is Part 3 of a three-part series on Vehicle Fuels and Technology.

1. Plug-in Cars: The Lowdown
2. Hydrogen Fuel Cell Vehicles
3. Fossil Fuels and Biofuels


The author of today’s post, Sheryl Canter, is an Online Writer and Editorial Manager at Environmental Defense.

This last post in our series on Vehicle Fuels and Technology gives an overview of fossil fuels and their alternatives. You will see how crude oil pumped from the ground is transformed into everything from solvents to street tar. And you’ll learn which biofuels can be substituted for fossil fuels.

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Posted in Cars and Pollution / Read 3 Responses

New Report on Cars and Carbon

The author of today’s post, John DeCicco, Ph.D., is a Senior Fellow for Automobile Strategies at Environmental Defense.

How much carbon dioxide (CO2) are cars emitting, and is it getting better or worse? The answer is in our new report on Automakers’ Corporate Carbon Burdens. It’s the third in a series we began in 2002, and covers 1990-2005. Some findings of note:

  • Toyota and BMW have shown that it’s possible to cut the CO2 emissions rate while enjoying strong sales growth – a lesson to the other 10 automakers we examined, whose emissions rates all increased in 2005 compared to 1990. Automakers can significantly reduce carbon emissions through creative design and incremental enhancement of conventional technologies.
  • The average CO2 emissions rate from new vehicles fell 3 percent from 2004 to 2005 – the first drop in nearly two decades. We probably can thank high gas prices for this since it made new car buyers think about fuel efficiency. Gas-guzzling truck-based SUVs became less appealing, and this accelerated the shift to car-based SUVs with better fuel efficiency.

But we still have a long way to go. Despite the one year drop, the emissions rate remains 4 percent higher than it was in 1988.

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Also posted in Greenhouse Gas Emissions / Read 6 Responses