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Photo: Marko Metzinger/Studio D

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Lisa P. Jackson, Administrator, U.S. Environmental Protection Agency
Best Habit: Turn off your screen savers and set your computers to sleep or standby mode after 30 minutes. A desktop screen saver can use 68 watts of electricity, while a sleeping computer can use just three.

Favorite Product: Energy Star-qualified decorative lights. If every set sold in the United States met that criterion, we'd prevent a billion pounds of greenhouse gas emissions and save $80 million on electricity in one year.

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