Union of Concerned Scientists

OCTOBER 26, 2022

When Congress passed the Clean Air Act in 1970, they determined that six so-called “ criteria air pollutants ”—particulate matter, ground-level ozone, carbon monoxide, lead, sulfur dioxide, and nitrogen dioxide—were so dangerous they required a rigorous and regularly updated process of assessment and policymaking.

Air Pollution 219

Air Pollution Ozone Ground-Level Ozone Clean Air Act 219

Union of Concerned Scientists

MAY 17, 2023

Earlier this month, the Environmental Protection Agency’s (EPA) Clean Air Scientific Advisory Committee (CASAC) released a draft set of recommendations calling on the EPA to tighten its current standard for ground-level ozone pollution to protect public health. But will the EPA follow CASAC’s recommendations?

Ozone 190

Ozone Ground-Level Ozone Air Pollution Clean Air Act 190

Union of Concerned Scientists

MARCH 29, 2023

According to the nonpartisan National Association of Attorneys General, a state attorney general’s job is to represent the public interest—not private, special interests—by, among other things, “enforcing federal and state environmental laws.” The case ultimately wound up in the US Supreme Court, which, in its controversial West Virginia v.

Fossil Fuels 347

Fossil Fuels Climate Change Sea Level Electricity 347