"MOSCOW — It was once protected by ice. Now regulation will have to do the work."

"Power producers such as Dynegy Corp. and Duke Energy Corp. are bracing for new U.S. rules on the water they discharge, standards that may impose further costs on the embattled coal industry."

"A BP executive testified the captain of the oil rig that exploded and sent millions of barrels of oil pouring into the Gulf of Mexico delayed activating the installation’s safety systems after the blast as a trial over the disaster ended."

"Debra White Plume and Marie Brush Breaker Randall stood in the middle of Highway 44, alongside more than 70 other members of the Oglala Lakota Nation. For hours, they didn't budge -- much to the chagrin of some tractor-trailer drivers bound for the tar sands region of Alberta, Canada."

"The newly formed group of Sierra Nevada bighorn sheep barreled up rugged Olancha Peak last month, the 10 females and four males becoming the first new herd of the endangered animals reintroduced in California in 25 years."

"The rate dropped 12% from 2005 to 2011, with improvements among all major racial and ethnic groups, a government report says."

"LONDON -- The development of low-carbon energy is progressing too slowly to limit global warming, the International Energy Agency (IEA) said on Wednesday."

With a tiny budget, the U.S. Chemical Safety Board is coming under fire for slowness in completing investigations on a large number of major accidents involving chemical hazards.

"A massive explosion at a fertilizer plant rocked the town of West, north of Waco, causing multiple casualties and leaving people trapped and buildings on fire.

Emergency personnel were bracing for the possibility of dozens of dead in the blast, which was reported at 7:53 p.m. and could be heard 45 miles away in Waxahachie.

Although authorities confirmed that at least five to 15 people had died, shortly before 5 a.m. they were still saying they did not have an official total. They have said they expect to find more bodies as they continue to search the area."