The WHO has identified air pollution as the biggest environmental threat to human health globally. Each year, an estimated ...

Most of the world has dirty air, with just 17% of global cities meeting WHO air pollution guidelines, a report Tuesday found.

EPA studies have confirmed that clean air regulations improve air quality over time. Other studies have shown that the health benefits greatly outweigh the costs. That pays off for the economy. Fewer ...

Among the changes are plans to rewrite a rule restricting air pollution from fossil-fuel fired power plants and a separate measure restricting emissions from cars and trucks. Zeldin and the ...