"Representative Edward Markey on Thursday asked Treasury Secretary Timothy Geithner to launch an immediate investigation into a $16 billion share-swap plan between BP and state-owned Russian oil firm Rosneft."

"Presidents Barack Obama and Hu Jintao of China, who is in Washington on an official state visit, said in a joint statement this afternoon that they 'view climate change and energy security as two of the greatest challenges of our time.' In an open letter today, U.S. environmental leaders urged the presidents to adopt 'a wartime-like mobilization' to cut greenhouse gas emissions."

"Fraudsters are targeting climate scientists with fake conferences in a bid to make cash and obtain details." Is it a ploy to plant spy programs on scientists' computers?

"The EV Cup -- the world's first circuit race series for zero-emission electric vehicles -- will hold its inaugural season of seven races this summer and fall."

Arch Coal's announcement of a second West Coast shipping terminal signals a trend toward increasing exports of strip-mined western coal to Asian nations like China, where demand outstrips supply. The implications for greenhouse emissions and accounting schemes for controlling them are huge.

A BP deal with the biggest Russian oil company to develop Arctic Oil could have huge geopolitical and environmental repercussions.

"Shrinking ice and snow cover in the Northern Hemisphere is reflecting ever less sunshine back into space in a previously underestimated mechanism that could add to global warming, a study showed."

"Experts worry that the world is facing a looming food crisis, one that we are currently not well prepared to deal with."

"Last year tied for the warmest since data started in 1880, capping a decade of record high temperatures that shows mankind's greenhouse gas emissions are heating the planet, two U.S. agencies said."

"In industrialized nations, people expect their drinking water to be pathogen free, thanks to treatment facilities that filter and disinfect the water. However, after reviewing 26 studies from 18 countries, two scientists conclude that some amoeba species called free-living amoebas (FLA) consistently survive these treatments and quickly multiply in drinking-water distribution and storage systems. Given their potential to spread disease, these microbes are a human health risk that demands further study, the researchers say."