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42,181,318 results
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 ...
2,096,877 views
9 months ago
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 ...
2,564,296 views
6 years ago