"The Obama administration has wound up its controversial investigation of a government polar bear researcher without finding any evidence of scientific wrongdoing, campaign groups said late Friday."

"Monsoon floods in Pakistan have killed 371 people and affected nearly 4.5 million, the government's disaster relief agency said on Friday."

Climate change and warmer temperatures are already hurting agriculture in California.

An ancient coal-fired power plant that has generated electricity -- and pollution -- in the heart of the nation's capital is finally closing for good.

"Disposed World War II explosives and munitions in the Gulf of Mexico pose a threat to offshore oil drilling, according to Texas oceanographers."

"Swift action is required to save many of the world's fisheries that are declining faster than expected, a study in a leading scientific journal shows."

"FLAGSTAFF, Ariz. — Klee Benally, a member of the Navajo tribe, has gone to the mountains just north of here to pray, and he has gone to get arrested. He has chained himself to excavators; he has faced down bulldozers. For 10 years, the soft-spoken activist has fought a ski resort’s expansion plans in the San Francisco Peaks that include clear-cutting 74 acres of forest and piping treated sewage effluent onto a mountain to make snow."

"Pregnant rats exposed to an industrial pollutant passed on a variety of diseases to their unexposed great-grandkids, according to a study published Wednesday."

"Installed EU wind capacity has reached the 100 gigawatt mark - the equivalent of power generated from 39 nuclear plants or a train of coal stretching from Buenos Aires to Brussels - but financial risk threatens growth, industry body EWEA said."

"BROOKLYN, N.Y. -- With each steady stroke, John Lipscomb inched the canoe deeper into an infamous urban waterway. The water surrounding the boat grew increasingly murky; the sulphuric stench more offensive."