Canada faces a monumental challenge in finding a way to store or dispose of highly radioactive spent nuclear fuel. The problem has dragged on unsolved for decades, and any solution is likely to prove costly.

"A new study has found that downloading music is substantially better from an emissions perspective than buying compact discs."

"Kenya's lion population could disappear altogether in the next 20 years because of climate change, habitat destruction, disease and conflict with humans, the country's wildlife authority said on Monday."

"Very low doses of some types of the herbicide Roundup can disrupt human liver cell function; the formulations' toxicity may be tied to their 'inactive' ingredients rather than the active weed-killing ingredient glyphosate."

Some parts of the U.S. are "food deserts," where liquor stores may vastly outnumber grocery stores. Now one Detroit group is fixing that by taking fresh veggies to an inner city neighborhood in what looks like a Good Humor truck.

"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."