Fracking is implicated in a series of 11 earthquakes in Ohio.
Worldwide emissions of carbon dioxide rose by 5.9 percent in 2010, announces the Global Carbon Project, the largest jump in any yearsince the Industrial Revolution.
In 2011, reports the National Oceanic and Atmospheric Administration, the United States suffered a record dozen climate disasters causing damages of $1 billion or more each.
Eleven-hitherto overlooked species of bee are discovered in the eastern United States, including four new varieties in New York City.
Shades of The Simpsons: In Argentina, a three-eyed fish is caught in a lake next to a nuclear power plant.
Yellowstone grizzly bears deserve protection under the Endangered Species Act, rules the U.S. Ninth Circuit Court of Appeals. A major threat facing Ursus arctos horribilis, notes the court, is climate change.
A $209 million settlement is reached in a lawsuit involving the Upper Big Branch mine disaster, which killed 29 coal miners in West Virginia in April 2010. The agreement leaves the door open for criminal prosecutions of individuals connected to the explosion. The final report by the Mine Safety and Health Administration says that the disaster was entirely preventable and lays the blame squarely on mine owner Massey Energy.
Gray wolf OR-7 wanders into California, the first wild Canis lupus in the state since 1924. —Paul Rauber
Left column, from top: iStockphoto/ados, iStockphoto/RonTech2000, iStockphoto/Pleasureofart, iStockphoto/LukaszPanek; Right column: Matthias Breiter/Minden Pictures