Plans for new nuclear power plants in the U.S. lose appeal as Congress doesn't act on carbon emissions rules and natural gas becomes plentiful and cheap.
Canada — home to two-thirds of the total polar bear population left on earth — is debating putting the species on an at-risk list. That would mean trying to place an economic value on the animal.
The renewable energy company Evergreen Solar spent millions of dollars building a high tech plant to make solar panels. But after three years, the company is closing its Massachusetts factory.