To meet ambitious climate goals, L.A. needs more local water. A critical step is battling the ghosts of industry past — polluted groundwater that dates back to World War II.

New kinds of flood plans put nature back in charge, help populations adapt to a changing climate, reduce risk — and more.

A range of new tactics aim to curb cigarette butt pollution, including groundbreaking legislation that could hold tobacco companies accountable for their products’ waste.

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.

An indigenous resistance is leading the fight to protect Central America's rivers from an onslaught of dams that threaten the region's rich biodiversity.

The majority of coal plants in the United States, like the Hunter Power Plant in Utah, are contaminating groundwater with toxic pollutants, a new report reveals.

A plan to lease oil and gas drilling rights on nearly a million acres of land near the Te-Moak Tribe of the Western Shoshone illustrates the consistent lack of government consultation with tribes.