Biology
Can Soil Microbes Slow Climate Change?
One scientist has tantalizing results, but others are not convinced
Stories by John J. Berger
Climate
Crisis in the Cryosphere, Part 2
The thawing of carbon-rich permafrost is one huge problem, but the loss of the planet's great ice sheets is equally worrisome
Climate
Crisis in the Cryosphere, Part 1
Thawing permafrost is threatening to add greenhouse gases to the atmosphere, complicating efforts to hold off climate change
