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3,317,000 results
Every year, the world uses 35 billion barrels of oil. This massive scale of fossil fuel dependence pollutes the earth, and it won't last ...
2,564,405 views
6 years ago
Small Wind Turbines have been all the craze lately, as they're said to be an incredibly cheap to run and efficient way for buildings ...
2,098,014 views
9 months ago