2026 Greenhouse Nitrogen Oxides 
Union of Concerned Scientists
DECEMBER 21, 2023
But while greenhouse gas emissions may be reduced, a delivery fulfilled by a diesel-burning truck may lead to increases in emissions of smog-forming nitrogen oxides and lung-damaging particulate matter.
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.
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Union of Concerned Scientists
MARCH 26, 2024
By 2032, new light-duty vehicle climate emissions would decrease by nearly 50 percent (to 85 grams/mile) compared to existing standards that go through 2026. The overall combination of reductions in particulate matter, nitrogen oxides and other air pollutants are expected to deliver $13 billion in annual health benefits.
Union of Concerned Scientists
NOVEMBER 28, 2023
EPA considering a range of alternatives EPA proposed standards that would aim to reduce greenhouse gas tailpipe emissions by about 70 percent compared to today’s vehicles (or about a 60 percent reduction from the 2026 standards currently on the books), to a lab certification level of emissions of 82 grams per mile (g/mi) by 2032.
Union of Concerned Scientists
APRIL 13, 2023
While EPA has projected gasoline vehicles to improve by close to 20 percent between now and 2032 in order to meet its standards, largely the result of standards already on the books through 2026, this could and must be closer to 30-35 percent to be consistent with our urgent need to address climate change.
Legal Planet
OCTOBER 5, 2023
greenhouse gas emissions, more than the electric power sector. The transportation sector is also a substantial source of nitrogen oxides and particulates, both of which are dangerous to human health. Transportation is now the source of 28% of U.S. Before starting, here’s a little more background about the three cases: Texas v.
Union of Concerned Scientists
FEBRUARY 10, 2025
emissions, and just under 15 percent of climate-warming greenhouse gas emissions from the states on-road vehicles. EPA 2024 Additionally, emissions of climate-warming greenhouse gases from trucks are on the rise, up nearly 80 percent in the past 3 decades compared to a less than 10 percent increase among light-duty passenger vehicles.
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