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The U.S. Supreme Court has let stand a ruling that firms may be held responsible for pollution that drifts across borders .

A group of Guatemalan villagers are suing the Canadian mining company Hudbay Minerals claiming it is responsible for violence that left one man dead, another paralyzed and a group of women victims of gang rapes, something the company denies.

Anchor Aaron Schachter talks with The World’s environment editor Peter Thomson about an oil spill that may have big consequences for a plan to pump oil from Alberta to the Pacific Ocean, and play into the fight over the Keystone oil pipeline in the US.

This summer, British and Canadian researchers plan to test new technology for releasing previously unrecoverable energy trapped in heavy oil deposits. It works by stimulating tiny microbes to chew up the sticky, tar-like heavy oil and metabolize it into natural gas. Guest: Steve Larter, New Castle University, University of Calgary