In Brazil, the third activist leader in a week opposing destruction of the Amazon rain forest was murdered.

The National Oceanic and Atmospheric Administration has decided that the declining Atlantic populations of the bluefin tuna do not warrant endangered species protection for now.

"The annual G8 Summit concluded this afternoon with agreement among leaders of the world's largest industrial democracies to strengthen nuclear security in view of Japan's ongoing nuclear power plant crisis."

"Concerned about the threat of a catastrophic outbreak of a herpes virus among wild horse herds in the West, national animal advocates on Thursday called on the federal government to keep potentially infected domestic horses away from mustangs and burros on public lands."

"At Chevron's annual general meeting Wednesday, the oil giant's chief executive John Watson, the Board of Directors and shareholders were greeted by over 150 activists, who traveled to San Ramon from throughout the world. They came from Angola, Indonesia, Nigeria, Alaska and Ecuador to share their stories of the human and environmental degradation Chevron had unleashed in their communities."

"Shareholders of Massey Energy Co. asked a judge on Thursday to block the company's pending acquisition unless they are allowed to pursue claims that company directors ignored safety for profits and should be held accountable for a mine explosion that killed 29 workers last year."

"Nuclear fuel at the stricken Fukushima Daiichi power plant began melting just five hours after Japan’s March 11 earthquake, a Japanese nuclear engineer told a panel of U.S. scientists Thursday."

"In the first substantive hearing of the consolidated litigation over last year's Gulf of Mexico oil disaster, corporate defendants told U.S. District Court Judge Carl Barbier Thursday that claims for economic damage, claims by first responders who got sick from cleaning up the oil, and suits by environmental advocacy groups should be dismissed."

Conservative claims that endangered species protections for the 2-inch-long desert pupfish are endangering the lives of U.S. Border Patrol agents flunk the fact-check test, according to a federal official in Arizona.