The effects are immediate and dramatic. Scientists witness unexpected changes in rivers after knocking down dams: 'We didn't ...

California, Arizona and Nevada are urging the Trump administration to change course on the Colorado River. The states are ...

The real danger wasn’t the stream but what lay beyond — where it spilled into the ocean and the currents were treacherous. On ...

Authorities and environmentalists in Zambia fear the long-term impact of an acid spill at a Chinese-owned mine that poisoned a major river and could potentially affect millions of people after signs ...