Alabama’s Mobile River basin has the most aquatic biodiversity in the country. But we’re in danger of losing it before we even know what’s there.

Some parts of the United States could easily generate 10 times their energy needs, according to a new report.

The planet needed a big win, and from the top to the bottom of the ballot there were a number of crucial victories.

The United States must grapple with a legacy of 90,000 dams, many unsafe or unwanted.

U.S. states hope to tap Canada’s network of large dams to meet low-carbon goals, but do better options exist closer to home?

Collisions between whales and ships have increased, but an effort to hear, see and predict whale behavior could help reduce fatalities.

Across the country voters will weigh in on ballot measures to decide issues like wolf reintroduction, taxes on oil companies and renewable energy standards.

With his new “field atlas,” Kaufmann challenges readers to better understand the places where we live — and to protect them.

A plan to import hydropower from Canada to Massachusetts begs the question of whether big hydro along with its reservoirs and dams, is green enough to be worth the cost.

In The Reindeer Chronicles, Judith D. Schwartz shows how badly damaged landscapes are being restored across the world — and why more of that work is deeply needed.