"The Environmental Protection Agency has ordered air pollution limits tightened on a Baltimore trash-to-energy incinerator after finding the state improperly relaxed them and did not require adequate monitoring of the plant's toxic emissions."

"Three key Senate Democrats are urging their colleagues to reject a proposal in the emerging climate bill that would give a cut of oil and gas production royalties to states that allow offshore drilling."

"The Interior Department is writing new regulations for mountaintop-removal coal mining that would expand protection for waterways and require the restoration of dynamited areas."

National Geographic takes a breathtaking look at Mount St. Helens, and the Washington ecosystem around it, both as it was before the devastating volcanic eruption of 30 years ago and as it is today after recovery.

The sand used to give blue jeans that worn look can cause silicosis, a potentially lethal lung disease -- in workers.

Michigan activist Lynn Henning, who endured abuse as she campaigned against water pollution caused by manure spreading, received the prestigious Goldman Environmental Prize.

"The Environmental Protection Agency on Friday proposed rules to cut mercury air emissions from U.S. gold ore processing and production facilities."

"An ocean census has revealed a 'new world' of richly diverse marine microbe life that could help scientists understand more about key environmental processes on Earth, a study said Sunday."

"The Air Quality Management District is hoping users of traditional gas-powered lawn mowers will help them "mow down air pollution" when, for the eighth year, the air pollution control agency hosts a series of lawn-mower exchanges throughout Southern California. The program allows local residents to trade in a gasoline mower and receive a new electric mower at a reduced price."

"President Obama launched the America's Great Outdoors initiative Friday, an attempt to reshape U.S. conservation policy at a time when the nation is facing new environmental threats but the government is hard-pressed to afford new spending programs."