Drought has already killed more than 100 wild horses. Volunteers hope to prevent more deaths.

A review of Trump’s stated war on regulations doesn't find many successful repeals. But it is hurting regulatory enforcement in quieter ways.

Chemicals collect in microplastics, which then get eaten by fish, birds and seals — and by humans.

Eco-books coming out this month cover some of the most important topics on the planet — and give you some tools to help.

The U.S. Department of Agriculture killed more than 23,000 beavers last year. There’s a better way to manage our ecosystem engineers.

Specialized environmental courts are now operating on every continent except Antarctica. What’s behind the boom?

In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.

Water managers say no, but Native American tribes are keeping careful watch on the “water that connects us.”

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