Waste not: Turning garbage into energy

CBS News: STATEN ISLAND, NEW YORK CITY - How do you make sure that trash doesn't go to waste? By turning it into usable energy.

Well, not the trash itself - rather, the "landfill gas" it emits when it decomposes. That gas is roughly half carbon dioxide and half methane. It's that methane that's the key, because it is the primary ingredient in natural gas.

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