"Since the mid-1990s, hurricanes and tropical storms have struck the Atlantic Ocean with unusual frequency -- or have they? Two new studies suggest that the situation may not be so clear."

New research offers a partial solution to the ongoing mystery of deformed frogs.

"The chairman of agribusiness giant Monsanto demanded Monday that his counterpart at DuPont -- his firm's leading competitor in the seed business -- appoint a special committee to investigate what he said was a pattern of covert attacks on Monsanto's business practices by DuPont."

"Hard on the heels of the health care protests, another citizen movement seems to have sprung up, this one to oppose Washington's attempts to tackle climate change. But behind the scenes, an industry with much at stake -- Big Oil -- is pulling the strings."

"Congressional investigators have uncovered five more letters sent to members of Congress that falsely claimed to be from charities expressing opposition to climate change legislation."

"A limestone 'quarry alley' 45 miles west of downtown Louisville resembles the scarred landscapes of eastern Kentucky, flattened by blasting for coal. ... Limestone, it turns out, is the key ingredient for stripping sulfur dioxide from smokestacks, helping to reduce acid rain and asthma-inducing haze."

"The U.S. Army Corps of Engineers reissued a permit Friday to Coeur Alaska Inc. for its Kensington mine plans, clearing the way for construction to resume on the final component of the complex that's been on hold since 2006 because of environmentalists' lawsuits."

"The manufacturer settles an environmental lawsuit with California over lead used to keep the artificial turf green. AstroTurf and other turf-makers insist their product is safe in California."

"U.S. Agriculture Secretary Tom Vilsack on Friday outlined a vision for managing the nation's forests that placed a high priority on restoration to protect water resources and combat climate change."

"The reclassification of nearly 1 million acres of land around the Grand Canyon to prevent new mining claims comes with a fundamental change in how the U.S. Forest Service does business with mining companies."