Ice sheets in Greenland and Antarctica are melting much faster than expected. At this rate, we can expect a sea-level rise of three to five feet by 2100.
King crabs are colonizing warmer Antarctic waters for the first time in 40 million years.
A wrecked ship off Nightingale Island in the South Atlantic spills 1,500 tons of crude oil, endangering the world's largest population of rockhopper penguins.
Canned foods and drinks are a major source of the hormone-disrupting chemical BPA, suggests new research. When study participants switched from cans to a diet of fresh food, their BPA levels dropped by 66 percent.
As part of a deal to continue funding the U.S. government, Congress removes wolves in the northern Rockies from the endangered-species list—the first time it has done so.
The same budget deal also defunds an Obama-administration plan that would have made millions of acres in the West eligible for protection as wilderness.
The United States slips to third in clean-energy spending, behind China and Germany.
Net U.S. greenhouse-gas emissions in 2009 were 14 percent lower than they were in 2000.
In 2010, renewables provided 11 percent of U.S. energy, the same amount as nuclear power.
Since 1900, forests in North America, Europe, the Caucasus, and Central Asia have increased by nearly 100,000 square miles, an area larger than Great Britain.
This article has been corrected.
First column, from top: Tui De Roy/Minden Pictures, iStockphoto/smartstock; second column, from top: iStockphoto/thebroker, iStockphoto/SVLumagraphica