Obama administration must decide by midsummer whether to extend a freeze on uranium mining claims near the Grand Canyon. A recent report cites 10 national 'treasures' at risk.
A congressional report finds that chemicals used in 'hydrofracking' to extract natural gas are known or possible human carcinogens, regulated under federal environmental laws.
Solar power is generated by photovoltaic cells, but two scientists are exploring different materials that could foster voltage from light's magnetic effects.
Tennessee Valley Authority says it will phase out 18 older coal-fired generators at three power plants by 2020. Natural-gas and biomass units will replace the coal power as part of a TVA settlement over clean-air violations.
House Republicans want to reshape federal environmental policies by adding amendments to the spending bill due Friday. Senate Democrats and the president oppose the 'riders.'
2,000-year-old coral found: Scientists have found 2,000-year-old coral, some of the oldest living organisms on Earth, near the site of the damaged BP Gulf well.
The tiger population of India grew by 300 in the past four years. But this week 13 Asian nations are meeting to discuss ways to save the last remaining tigers.
Great white shark: Researchers have found that fewer great whites are in the Pacific ocean than previously believed. Other shark species from around the world have also suffered steep population declines like the great white shark's in recent years.
Stricter Chesapeake Bay rules may hurt farmers, who say they’re already doing their part to clean it up.
Runoff from unusual snowfall in Alabama caused water temperatures in Mobile Bay to drop suddenly, possibly leading to stillbirths of baby dolphins, researchers say. Poisoning as a result last year's oil spill is another possible culprit.
Eastern cougar: The US Fish and Wildlife Service declared the eastern cougar to be extinct, saying occasional sightings were not the extinct ghost cat.
The Obama administration lifted its post-Gulf oil spill moratorium on oil drilling in deep water Oct. 12, but it didn't issue its first new permit until Monday. Some experts think rising oil prices forced the administration's hand.
Plaintiffs representing 30,000 people appealed an Ecuadorian court judgment that ordered Chevron to pay $9 billion in damages for oil contamination in the Amazon. The oil giant is also contesting.
The US Department of Transportation’s pipeline safety division says the 800-mile trans-Alaska pipeline is corroded and poses a severe public safety and environmental risk.
Record droughts hit the Amazon's rain forests in 2005 and 2010. With climate models projecting more drying with global warming, researchers are keeping close watch for such extreme droughts.
For years researchers have watched plants and animals migrate to cooler quarters in response to global warming. But a new study suggests some plants are moving downhill, drawn by increased precipitation.
The seasonal cooling effect of light-reflecting snow and ice in the Northern Hemisphere may be weakening at twice the rate predicted by climate models, a new study shows, accelerating the impact of global warming.
A panel of weather and climate experts ranked the the Top 10 global weather and climate events of 2010. Voters considered the scope and unusualness of the event, its immediate human and economic impact, and whether it is emblematic of climate trends or variability. They voted during the first week of December, so the following weeks' extreme winter weather in Europe, which may have deserved a spot in the Top 10, received an honorable mention.
2010 tied as warmest year ever, NOAA climatologists say. Year's data are consistent with the notion that greenhouse gases from burning fossil fuels are contributing to global warming.
The study's leaders say rates of methane decomposition after the Gulf oil spill 'were faster than had ever been recorded in any other place on the planet.' Other scientists are cautious about the results.