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In South Asia, Vehicle Exhaust, Agricultural Burning and In-Home Cooking Produce Some of the Most Toxic Air in the World
In 2014, the World Health Organization reported that New Delhi was one of the most polluted cities in the world, with dangerous levels of fine particulate matter pollution, known as PM2.5.
Related Knowledge Center: Air emissions
State of Play
More than 30 years after the last major update of the Clean Air Act, the U.S. Supreme Court has upended the ability of Congress to give the Environmental Protection Agency and other federal agencies broad scope to combat air pollution, including the emission of greenhouse gases. Meanwhile, further Biden administration efforts to limit emissions face opposition in the courts.