Weeds are rapidly becoming immune to herbicides, according to researchers at Iowa State University at Ames, thanks to the popularity of herbicide-resistant bioengineered crops and the increased use of herbicides like glyphosate.
The Supreme Court won't let states regulate greenhouse gases on their own, saying it's up to the EPA.
Radioactive tritium has leaked from 48 of 65 U.S. nuclear power facilities, often into groundwater.
Interior secretary Ken Salazar halts new uranium mining at the edge of the Grand Canyon.
Nuclear power stations in Scotland and Israel are shut down after huge numbers of jellyfish clog their cooling-water intake screens.
A federal investigation blames Massey Energy for the Upper Big Branch Mine explosion, which killed 29 miners last April.
Texas, now in the worst drought since record keeping began 116 years ago, is declared a disaster area.
Neighboring Oklahoma is drier now than it was during the 1930s Dust Bowl period.
The sea is now rising faster than at any time in the past 2,100 years.
Shailendra Kumar Upadhyay, the 82-year-old former foreign minister of Nepal, tries to become the oldest person to climb Mt. Everest but dies in the attempt. —Paul Rauber
Left column, from top: Courtesy ofTokyo Electric Power Co./Kyodo via AP Images, iStockphoto/Flatcoater
Right column, from top: iStockphoto/alex_kz, iStockphoto/1Photodiva