States

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.

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.

There’s much to learn from local efforts — and good reasons why they’ll need to be part of the process, experts say. But can states do it on their own?

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 look back at the circuitous, bloody history of attempts to remove wolves from the Endangered Species Act.

Ecologist Jodi Hilty explains what conservationists have learned about linking critical habitat areas together.

Experts have recommended how the United States can drastically curb the use of throwaway plastics with new federal legislation.