"Environmental groups presented a federal official with more than 19,000 signed letters and postcards Tuesday asking the U.S. government to set stricter rules to prevent pollution in the Chesapeake Bay."

"The Prius hybrid automobile is popular for its fuel efficiency, but its electric motor and battery guzzle rare earth metals, a little-known class of elements .... That makes Toyota's market-leading gasoline-electric hybrid car and other similar vehicles vulnerable to a supply crunch predicted by experts as China, the world's dominant rare earths producer, limits exports while global demand swells."

"A Global Framework for Climate Services that would provide climate forecasting the way that weather forecasting services do is in the works."

"Humans may have to reset the Earth's natural thermostat and develop new technologies like reflecting sunlight back into space if climate talks fail, Britain's top science academy said on Tuesday."

"The level of inorganic mercury in the blood of American women has been increasing since 1999 and it is now found in the blood of one in three women, according to a new analysis of government data for more than 6,000 American women."

"Wolf hunting season opened Tuesday in the state of Idaho."

"A group of 91 countries have agreed on a treaty that will block ships involved in illegal fishing from entering signatory ports and thus help prevent the fish going to market, the UN said on Tuesday."

"Getting involved in a social or environmental cause these days is as easy as clicking your mouse." Are we becoming a nation of slack-tivists?

Four years after Hurricane Katrina destroyed some 200,000 homes in New Orleans, the city has embraced a new and unexpected role as a laboratory for green building.

"Restrictions on the sale of incandescent bulbs begin going into effect across most of Europe on Tuesday in the continent’s latest effort to get people to save energy and combat global warming."