A new book explains why policymakers nearly 100 years ago chose to ignore the best science on the Colorado River’s flow — and the dangers if we repeat their mistake.

Revoking California’s ability to set stricter air-pollution standards also misses three important benefits to California and the nation.

From Bogota to Baltimore climate strikers turned out for the first of a week of events to push for action on climate change.

The author and activist talks about climate hope, grief and her new book, On Fire: The (Burning) Case for a Green New Deal . 

Changes to regulations about critical habitat and consideration for economic interests threaten to upend more than 45 years of conservation success. But the worst may still be to come.

While the Trump administration continued its anti-environmental policies, the planet experienced its hottest month in recorded history. But are the winds starting to shift?

A sweeping “circular economy” bill in the California legislature aims to drastically reduce plastic waste and boost domestic recycling.

States that share the river’s water finalized a big agreement last month, but an even larger challenge determining the river’s future is just around the bend, expert John Fleck explains.

Most dam removals take years, often decades, of political, ecological and financial wrangling. A new book, Same River Twice, looks at three dam removals and what made them possible.

Major reforms are needed to the federal program that assesses flood risk, but Congress just punted — for the 11th time — on an opportunity to fix it.