The Obama Administration announced the finalized historic fuel economy and greenhouse gas emissions standards for light-duty vehicles. The final program for model year 2017-2025 passenger cars and trucks will require an average CO2-level of 163 grams per mile, which is equivalent to 54.5 miles per gallon by 2025, if all reductions are made through fuel-economy improvements.

This summary provides an overview of EPA’s proposed New Source Performance Standard (NSPS) for greenhouse gas (GHG) emissions from new power plants under Section 111 of the Clean Air Act. It was drafted in partnership with the Pace Energy and Climate Center.

Auto-rickshaws are an integral part of urban transport in Indian cities. Photo by Kara Newhouse.

Los Angeles is offering free rides to regular commuters (and Santas) on Christmas Eve and New Year's Eve. Photo by Greg Thomas.

Having exceeded air safety limits 56 times in 2011, Rome is limiting vehicle use in hopes of pushing pollution levels down. Photo by zenra.

This article originally appeared in the May/June 2011 edition of The Environmental Forum (www.eli.org), and is reposted with permission.

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p>In two legal challenges filed in the wake of the Supreme Court decision in Massachusetts v. EPA, a number of states and non-governmental organizations sought to compel the U.S. Environmental Protection Agency (EPA) to regulate new and existing power plants under section 111 of the Clean Air Act.

WRI experts take closer look at some of the myths, inaccuracies, and misinformation surrounding Environmental Protection Agency regulation of greenhouse gases.

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p>While the Senate recently defeated four bills or amendments that would restrict EPA’s authority, it remains to be seen if additional anti-EPA bills will be introduced in the U.S. Congress or in state governments.

New analysis from WRI and rating agency Standard & Poor’s looks at impacts on businesses and credit quality.