"President Obama, speaking to an enthusiastic audience of union officials in Lanham, Md., on Tuesday, underscored his embrace of nuclear power as a clean energy source, announcing that the Energy Department had approved financial help for the construction of two nuclear reactors in Georgia."

"A long-awaited study by the International Agency for Cancer Research -- an arm of the World Health Organization -- will attempt to give the world's billions of cellphone users a better informed perspective" on whether the phones cause brain tumors or present other health risks.

"There’s an interesting insurgency that may give lie to recent predictions of federal failure on cap and trade. Sen. Maria Cantwell (D-Wash.) has a modified 'cap and dividend' bill, called the CLEAR Act, that’s slowly but surely picking up momentum."

"Ex-weatherman Anthony Watts says many US weather stations produce unreliable data because they are located next to artificial heat -- but a scientific analysis suggests that, if anything, such stations underestimate warming."

"S.C. legislators are being asked to loosen state rules so a New Jersey company can build a $450 million garbage incinerator in jobs-hungry Chester County."

Growing pollution in the Baltic Sea has been making it unswimmable and contaminating fish. Now Russia has sealed a deal to put a pipeline beneath the Baltic -- with big international repercussions.

"A new study says the seas are acidifying ten times faster today than 55 million years ago when a mass extinction of marine species occurred. And, the study concludes, current changes in ocean chemistry due to the burning of fossil fuels may portend a new wave of die-offs."

Scholars and Rogues investigated climate-change deniers' claim about Pennsylvania State University's inquiry into allegations of research misconduct against Michael Mann. The publication found that allegations of a cover-up were "extremely unlikely" to be true.

"SAN FRANCISCO -- If electric cars have any future in the United States, this may be the city where they arrive first. The San Francisco building code will soon be revised to require that new structures be wired for car chargers. Across the street from City Hall, some drivers are already plugging converted hybrids into a row of charging stations."

"Indiana Sen. Evan Bayh will not seek re-election this year, a decision that hands Republicans a prime pickup opportunity in the middle of the country. ... What's bad news for the Dems in the longer term could be good news for the climate bill in the short term."