Clean Air Act Fossil Fuels Nitrogen Oxides 
Union of Concerned Scientists
DECEMBER 1, 2022
California has a longstanding leadership role on transportation pollution, and the Clean Air Act grants the state the right to set strong vehicle emissions standards. While the waiver addresses California’s ability to enforce its rules, the Clean Air Act also allows other states the ability to adopt California’s policies.
Union of Concerned Scientists
JULY 3, 2022
The majority 6–3 decision sharply curtails the EPA’s authority to set standards based on a broad range of flexible options to cut carbon emissions from the power sector—options such as replacing polluting fossil fuels with cheap and widely available wind and solar power coupled with battery storage.
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Union of Concerned Scientists
AUGUST 21, 2024
The underlying statute defines “clean” to mean that the facility GHG emissions rate—i.e., The tax credits do not consider other fundamental dimensions of “clean,” such as emissions of health-harming pollution like nitrogen oxides or particulate matter. Treasury and the IRS must set rules that do just that.
Legal Planet
MARCH 6, 2023
Hydrogen’s supply-side has been buttressed by incentives from state and federal governments, refineries and utilities looking to extend the life of fossil fuel infrastructure, and renewable energy companies seeking to take advantage of the huge amounts of clean energy needed to produce green hydrogen.
Union of Concerned Scientists
JUNE 3, 2024
Despite the generous funding opportunities and holistic flexibilities baked into ACF, confusion around and misinformation about the rule may undermine this much-needed shift away from fossil-fueled trucks and buses. The ACF is estimated to significantly reduce pollution from the statewide commercial truck and bus fleet.
Clean Energy Law
NOVEMBER 25, 2019
One of the most significant air quality challenges in the Basin is reducing emissions of the ozone precursor nitrogen oxides (NO x ) to meet the ozone standard attainment deadlines. According to the 2016 AQMP, mobile sources contributed about 88% of total NO x emissions in the Basin in 2012.
Union of Concerned Scientists
OCTOBER 4, 2023
Differences between setting fuel economy and emissions standards Under the Clean Air Act, EPA is obligated to reduce pollution from mobile sources like passenger cars and trucks when those emissions are a risk to public health and/or welfare. On the other hand, NHTSA doesn’t incentivize EVs so heavily.
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