"Nations and individuals have a duty to reduce greenhouse gas emissions and enact policies that mitigate global warming, said a Vatican-sponsored working group."

"Renewable energy could meet nearly 80 percent of the world's energy needs by mid-century and play a crucial role in fighting global warming, the UN's climate scientists said Monday in a major report."

"Thursday night's Republican debate was worth watching if only to see Tim Pawlenty try to talk his way around his previous support for efforts to cut planet-warming emissions. As governor of Minnesota, Pawlenty not only acknowledged that climate change is a problem, but also endorsed a cap-and-trade plan to deal with it. That makes him something of a pariah among other Republicans these days."

"The protracted fight over this year's federal budget has left its mark on the nation's climate and weather satellites, experts said yesterday at a conference organized by defense trade publisher IHS Jane's."

"Two environmental groups have challenged the air pollution permit for a $750 million iron plant in southwestern Louisiana, which is the first project that was approved under the greenhouse gas regulations that were implemented by U.S. EPA in January."

"Advocates of stringent curbs on greenhouse gas emissions sued the federal government on Wednesday, arguing that key agencies had failed in their duty to protect the earth's atmosphere as a public trust to be guarded for future generations."

"The ice of Greenland and the rest of the Arctic is melting faster than expected and could help raise global sea levels by as much as 5 feet this century, dramatically higher than earlier projections, an authoritative international assessment says."

"Photographer Jonas Bendiksen made three separate trips to Bangladesh last year to document the wet season and the ways that rising waters are altering Bangladeshi life."