Conservationists and other campaigners are urging President Obama to designate 1.7 million acres of the Canyon watershed a national monument before he leaves office

The Las Vegas Valley Water District temporarily fixed the residential roadway that left one woman and her children stuck after driving into a sinkhole on Monday.

Science shows we can’t assume that uranium deposits, when disturbed by mining, can’t leak into groundwater. We should be wary of claims to the contrary