"The largest and most important U.N. climate change conference in history opened Monday, with organizers warning diplomats from 192 nations that this could be the best, last chance for a deal to protect the world from calamitous global warming."

"As America's petroleum heartland, Texas isn't known for being environmentally sensitive. But its oil-boom, energy savvy attitude could put the state in a surprising position--leading the charge to alternative energy in the U.S."

"Efforts are under way to reverse the deterioration of a major water source, the Sacramento-San Joaquin Delta in California, which is sinking."

"The Environmental Protection Agency said Monday that it would probably increase the amount of ethanol that gasoline retailers could blend into ordinary fuel, to 15 percent, if tests established that the blend would not damage cars."

"A very large, 30-year study of just about everyone in Scandinavia shows no link between cellphone use and brain tumors, researchers reported on Thursday."

"The U.S. Environmental Protection Agency is on schedule to release federal guidelines for the disposal of coal ash some time this month, but a potential loophole in the new rules has some worried they will leave Iowans unprotected."

"Maryland plans to dramatically increase the area of the Chesapeake Bay that is closed to oyster harvests, Gov. Martin O'Malley said Thursday, offering an expanded foothold to an iconic species that has dropped to 1 percent of its peak population."

"Nearly 28 years after Congress authorized the Army Corps of Engineers to deepen the Delaware River's main shipping channel, the only thing about the project that has deepened is the controversy."

"A study released Wednesday which found that nine of 10 babies tested were born with bisphenol A in their systems has renewed calls for the chemical to be banned."

"For eight months, the Quebec government has been holding on to a report that explores the link between asbestos-related cancer and Canada's only community that still mines the substance."