2002 Clean Air Act Ozone 
PA Environment Daily
NOVEMBER 5, 2021
In 2002, the Department implemented the then current CARB emission standards for all Heavy-Duty Diesel engines and vehicles that have a gross vehicle weight rating of 14,000 pounds in response to an emissions cheating scandal in the late 1990s, when engine manufacturers installed emission control system defeat devices.
Vermont Law
FEBRUARY 24, 2014
Every year, about 200,000 Americans die from smog, which is a mix of ozone and fine particulates (PM. The Clean Air Act (CAA) regulates smog, setting National Ambient Air Quality Standards (NAAQS) for ozone and PM. Many cities in the Northeast fail ozone and PM. and ozone NAAQS in any other state.
Union of Concerned Scientists
MARCH 29, 2023
In 2015, when he took office as AG after stints in the Texas Legislature, he sued the Environmental Protection Agency for strengthening a standard for ground-level ozone, better known as smog. EPA decision , upheld the EPA’s authority to regulate such emissions under the Clean Air Act but significantly constrained its ability to do so.
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