A two-year delay on new mercury rules benefits coal-fired power plants, while chemical plants got an exemption from stricter ...

Hundreds of new Texas laws go into effect on Sept. 1. From classroom changes to tougher penalties and new driving rules, here ...

Ozone is a secondary pollutant, meaning it’s not emitted directly from sources, but is formed through chemical reactions,” ...

Research finds it may not only be temperatures that make heat waves unsafe but also the heat-related increase in airborne ...

Study finds two Texas lakes among the nation’s dirtiest due to pollution, algae growth, and poor water quality.