As Nepal’s mountains warm, mosquitoes are spreading dengue, once strictly a lowland disease, to higher-elevation, ...

Scientists working on new reports for the IPCC, the U.N.’s climate science panel, warn about a funding crunch and report ...

China, the source of more than half the world’s sulfur hexafluoride emissions, will be key to the pledge’s success.

The massive, still-unfinished Deep Tunnel project was supposed to be the answer. But wastewater dumped in the river now ...