Living in Geologic Time: Will desertification overtake Nevada’s half-million-year history of wetlands?

Arizona’s Department of Environmental Quality is allowing a uranium mine operator to spray water laced with uranium and arsenic on the ground to keep dust down on its site, but it is considering the status of the mine’s permit.

Conservation groups hoped a new national monument would halt mining, but President Obama passed on the proposal.

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