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  • March 3, 2015

    Think you know where coal, solar and other power plants are located around the country? Test your knowledge with our power plants quiz!

  • February 24, 2015

    If you live in a warm climate, air-source heat pumps might be an efficient way to cool your home, and advances in technology are improving their efficiency in cool climates, too.

  • February 23, 2015

    Three historic sites of the Manhattan Project are on their way to becoming a national park.

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