"The federal government promoted some uses of coal ash, including wallboard or filler in road embankments, without properly testing the environmental risks, according to a report from the Environmental Protection Agency's inspector general."

"It has killed millions of fish and hundreds of dolphins and manatees. It has ruined countless Florida beach vacations. And it has left people with respiratory problems gasping for air. Yet until now, how Red Tide's poisons worked remained something of a mystery."

In 1961, three young nuclear plant operators in Idaho were killed when a small experimental power reactor melted down. They were so radioactive they had to be buried in lead-lined coffins under concrete. And one bereaved family was only allowed a five-minute funeral.

The big international Earth Summit coming next year in Rio de Janiero -- 20 years after the epochal original meeting there -- may generate both good news and bad news about the future of the planet.

"The U.S. Environmental Protection Agency has agreed to grant a petition by three nonprofit organizations to withdraw its approval for the potent greenhouse gas HFC-134a to be used in new automobile air conditioning systems."

The Nuclear Regulatory Commission currently requires nuclear plants to plan evacuation of a 10-mile circle in case of a radiation threat. But the government urged evacuation of a 50-mile circle after the disaster at Japan's Fukushima plant. Here's some information to help you calculate your own risk.

"An estimated 352,000 pounds of lead washed into Lake Coeur d'Alene on Jan. 18 after flooding related to a rain-on-snow event."

"A sleepy New Jersey town has popped onto people's radar screens because it has the oldest running nuclear power plant in the United States -- and, some say, the most dangerous."

"Japan’s effort to contain the crisis at the Fukushima Daiichi nuclear plant suffered a setback, an official said on Friday, citing evidence that the reactor vessel of the No. 3 unit may have been damaged."

Minnesota's Pollution Control Agency is trying to address the impact of dissolved chlorides in Twin Cities lakes -- road salt harming aquatic life. It may require changes in what it means to be a good neighbor in the snowy state.