2027 Clean Air Act Nitrogen Oxides 
Union of Concerned Scientists
OCTOBER 4, 2023
leader in cleaning up the light duty fleet quietly released its own proposal in August: the Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) has proposed to improve fuel economy of passenger cars and trucks steadily from 2027 through 2032 and heavy-duty pickups and vans from 2030 to 2035.
Union of Concerned Scientists
MARCH 25, 2025
Cleaner cars, cleaner air Our Cleaner Cars, Cleaner Air Report showed that while pre-2004 cars make up fewer than 20% of the cars on the road, they are responsible for the majority of tailpipe pollution because they produce higher amounts of lung-damaging particulate pollution and contribute significantly more smog-forming nitrogen oxide emissions.
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Legal Planet
OCTOBER 5, 2023
The transportation sector is also a substantial source of nitrogen oxides and particulates, both of which are dangerous to human health. EPA is an effort by conservative states and fuel suppliers to block EPA regulations of greenhouse gas emissions from motor vehicles under the Clean Air Act. Q: Hi, Sean.
Legal Planet
APRIL 10, 2025
And about the EPA having that email address set up for copy and paste exemptions to the Clean Air Act, which my colleague Mary D. Starting in 2027, manufacturers would be required to aim for a sales target of 30% for appliances that meet zero-NOx emissions standards, i.e., heat pumps and heat-pump water heaters.
Union of Concerned Scientists
JANUARY 21, 2025
California is allowed to set standards stronger than the federal government under the 1970 Clean Air Act provisions in recognition that CA, and many other states which have adopted CA standards , serve an important role as laboratories of innovation controlling air pollution in novel ways. In the U.S.,
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