2027 Air Pollution Nitrogen Oxides 
Legal Planet
MARCH 15, 2023
A policy brief published by the Emmett Institute in March 2022 outlines California air districts’ legal authority to adopt these kinds of regulations and suggests policy mechanisms to help ensure the transition to electric appliances is equitable and affordable. Richard Trumka Jr.,
Union of Concerned Scientists
OCTOBER 13, 2022
The Advanced Clean Fleets (ACF) rule has the potential to significantly reduce climate-warming greenhouse gas (GHG) emissions as well as harmful air pollutants like fine particulates (PM2.5) and nitrogen oxides (NOx) from the numerous commercial and government fleets of MHD vehicles in the state.
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Union of Concerned Scientists
MARCH 26, 2024
They will go into effect in model year 2027 and steadily increase in stringency through model year 2032. Here’s what you need to know: Climate Transportation is the largest source of climate emissions in the US (29 percent) and passenger cars and trucks account for the majority of this pollution. Far from it.
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
SEPTEMBER 26, 2022
pollution from vehicles. Among this fleet of trucks and buses, tractor trucks are, by far, the most significant polluters – although just about 1 in 10 medium- and heavy-duty vehicles, they’re responsible for around half of all emissions from the state’s fleet. There are more than 1.8 Public Agency Fleets.
PA Environment Daily
OCTOBER 25, 2023
The Advanced Clean Trucks standard modeled in the report would require manufacturers, beginning in 2027, to increase their zero-emission truck sales to between 30-50 percent by 2030 and 40-75 percent by 2035. The report was prepared by ERM and commissioned by NRDC and the Union of Concerned Scientists. These gains include $1.3
Union of Concerned Scientists
NOVEMBER 28, 2023
This year, the Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) proposed new emissions and fuel economy standards (respectively) for model year 2027-2032 passenger cars and light trucks (sedans, utility vehicles, pickups, etc.).
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