2027 Nitrogen Oxides Regulations 
Union of Concerned Scientists
JANUARY 21, 2025
In other words, if a regulation mentions electric vehicles, its probably on the target list. Trump is targeting both federal and CA vehicle standards in his recent executive order standards that not only reduce climate emissions but also slash air pollutants like nitrogen oxides and particulate matter.
Union of Concerned Scientists
FEBRUARY 10, 2025
Regulations like Californias Advanced Clean Trucks rule (ACT) have been key to driving increased ZET model availability and deployment in the early years of on-road freight electrification and will be crucial to accelerating this in the coming years.
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Legal Planet
APRIL 10, 2025
Wes Moore has decided to give car- and truck-makers extra time to comply with clean-vehicle regulations, after state officials there came under pressure from dealers who said they couldn’t meet the strict timelines. Energy stories that caught my eye Puerto Rico has the least reliable energy system of any place in the U.S.
Legal Planet
JUNE 9, 2025
Photo by Zan Dubin After 6 hours of public comment and discussion in a packed auditorium, Southern California air quality regulators on Friday rejected a pair of proposals that would have reduced harmful pollution from gas furnaces and water heaters. More than 200 people signed up to give public comments at Friday’s SCAQMD meeting.
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.
Union of Concerned Scientists
DECEMBER 15, 2022
The EPA is getting ready to finalize a critical regulation limiting emissions of smog-forming nitrogen oxide (NO X ) and soot (or particulate matter, PM 2.5 ) from new heavy-duty trucks. This is the first time EPA has sought to limit emissions in over two decades, and it is long overdue.
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.
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