Throwing trash into a pit is as good as throwing money into a pit. One landfill manager in Los Angeles tells us how to convert that trash into cash.

Working from home may not be as good for the environment as you think it is.

RAND study says military's plans to use biofuels are not likely to pay off, so research should be curtailed.

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.

This final note today: The curious case of the missing carbon permits. Europe, as you may know, has an emissions market (cap-and-trade is the term)…

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.

In the latest edition of Freakonomics Radio, Stephen Dubner talks to Kai Ryssdal about what it might take to get people to throw away less trash.

This final note today, a word on commodities as we leave 2010 in the rear view mirror….

Hotels around the country are urging their customers to "make a green choice" and opt out of daily housekeeping for their rooms. But cutting back on water and electricity might also be cutting back on something else: jobs. Sean Cole reports.