An MIT study published in a major science journal predicts that global warming will be twice as severe as previous estimates.

Despite having been banned in most uses for years, carbon tetrachloride, a probable carcinogen, persists in the environment. USA TODAY found it outside 70 of 95 schools in 30 states.

The House passed a measure that would allow visitors to carry loaded, concealed guns in National Parks. It passed 279 to 147, with 105 Democratic votes.

Two days of secret meetings in China during July 2008 may have laid the foundation for a new cooperation between the U.S. and China on climate change.

"Railroad companies are pressing federal regulators to cut back on trains carrying hazardous materials through urban areas, saying they fear a catastrophic release of toxic chemicals in a large city."

U.S. emissions of carbon dioxide related to energy use fell 2.8 percent last year, driven down by high oil prices and the sagging economy -- the steepest drop since 1982.

Gasoline prices are creeping back upward, but more American drivers are expected to hit the roads this Memorial Day than last year.

The Environment Report's Lester Graham interviews Interior Secretary Ken Salazar about problems and challenges he faces.

"The Senate yesterday unanimously approved three top-level Energy Department nominees and one Interior Department nominee."

"The Senate confirmed David J. Hayes as a top Interior Department deputy last night as two Republican senators ended a standoff with Interior Secretary Ken Salazar that had held up Hayes's nomination."

In the House climate bill, "consumers would receive around $750 billion in direct and indirect handouts and subsidies through 2030 to offset the higher energy costs."

"Advocates of gun rights are poised to win a Congressional victory that eluded them under a Republican president." Visitors carrying loaded and concealed weapons in National Parks.

The House Energy Committe amended its climate bill to include a "Clean Energy Deployment Administration" within the Energy Department that would fund new nuclear plants as well as renewables.

"Federal officials, who have spent much of the last decade 'avoiding their obligations under the Endangered Species Act,' need a contingency plan to save the endangered fish, the judge says."

EPA has found suspect materials in a small sample of Chinese-made drywall that some believe may be causing corrosion in homes and possibly sickening people.