The Southwest's monsoons are becoming more intense, even as less rain falls on average.
An increase in rain fueled by rising temperatures will wash more nitrogen into U.S. waterways.
An iceberg the size of Delaware just broke away from Antarctica. Just how much ice that?
If emissions aren’t reduced, ice-free areas are expected to grow by as much as 17,000 square kilometers.
A thaw of Greenland's ice sheet is pouring ever more water into the oceans.
Climate change may be altering the characteristics and impacts of drought across the U.S.
The Sierra Nevada continues to sport a deep snowpack after an epic winter.
Once seen as too remote to harm, the deep sea is facing new pressures from mining, pollution, overfishing and more.