Friday is Earth Day and there is a lot to celebrate. Schoolchildren across the country will be honoring our natural environment and learning about what steps we need to take to preserve our resources, just as they did when the holiday started on April 22, 1970. According to the Energy Information Administration, since 1970, the United States has become more efficient for each dollar of GDP in how it uses energy.
source CNN.com - World http://ift.tt/1WJVfIQ
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