Dozens of these water-filtering species are at risk of vanishing, and that’s bad news for every living creature that relies on them.

The rules, bemoaned by auto manufacturers, would have reduced carbon dioxide emissions by 540 million metric tons.

Eco-books coming out this April look at the life and death of Cecil the lion, the history of oppressive oil development, and living a zero-waste lifestyle.

The Trump administration is backing away from treaty mandate to “give preferential attention to the solution of all border sanitation problems.”

Video: The big cats face a long list of threats, from climate change to habitat loss to the illegal pet trade.

State regulators tried to get the future president to address problems on two golf courses. They got a lesson in how he handles regulatory challenges.

With environmental regulations under attack and EPA budgets being slashed, can the destruction of the agency be prevented?

The most famous rhino in the world has died, leaving behind two aging females and a hole in our world.

Disease outbreaks could be coming your way — our interactive map shows how you could be affected.

Mystery untreated sewage appears in Mexico just across the border from an Arizona wastewater-treatment plant, city official says.