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    Home Insulation Quiz

    Where Does Money Leak Out of Your House?

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Test your green know-how and learn how to shrink your environmental footprint on the planet!

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Sustainability

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    Help Save the Colorado River

    NG's new Change the Course campaign launches. When individuals pledge to use less water in their own lives, our partners carry out restoration work in the Colorado River Basin.

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    Sustainability at National Geographic

    The National Geographic Society aims to be an international leader for global conservation and environmental sustainability. Learn more about the Society's green philosophy and initiatives.

Learn More About Freshwater »