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An Open Letter from California Scientists and Engineers on Advanced Clean Cars and Reducing Heat-Trapping Emissions

More than 160 California scientists and engineers signed an open letter in support of efforts to reduce heat-trapping emissions from passenger vehicles.

Recent analysis, such as the Intergovernmental Panel on Climate Change's latest report on climate and extreme events, points to the increasingly urgent need for action to reduce global warming emissions. Cars, trucks, and other mobile sources account for nearly 40 percent of these emissions in California.

In the open letter delivered to two federal agencies and the California Air Resources Board, 161 California scientists and engineers with expertise in climate change, impacts, or solutions called for the adoption of policies to reduce emissions from new passenger cars and trucks and prompt greater automaker investment in the transformative advanced clean car technologies.

The three agencies released proposed standards in late 2011 that would reduce U.S. global warming pollution by 290 million metric tons in 2030, the equivalent of taking more than 40 million of today’s typical cars and trucks off the road for an entire year. They would also nearly double fuel efficiency standards to around 50 miles per gallon.

In late January, after delivery of the open letter, the California Air Resources Board voted to adopt a historic package of vehicle policies that will cut heat-trapping emissions from cars and light trucks in half by 2025, while accelerating the market for electric car technology. Find out more about this historic victory.

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