The United States produces 18,000 megawatts of electricity through its wind farms. And that is enough to power up to 5.4 million average U.S. homes. While Denmark gets 20 percent of its energy from wind farms, the Department of Energy predicts that one-fifth of the nation's power might come from wind, until 2030.

Between 1994 and 2009, subsidies for renewables represented only $370 million (according to DBL). But between 1947 to 1999, nuclear power had subsidies of $3.5 billion a year. While coal receives at least $3.2 billion a year, in our times (according to a 2011 study), the oil and gas industry has been averaging $4.86 billion dollars (in today’s currency), since 1918 (according to a 2011 study).

At the Green Microgym in Portland, Oregon, users can generate electricity as they burn calories on some of the exercise machines. The human engine runs on calories. A bowl of cereal has about 300 calories, which provides enough energy for an hour's worth of walking. An average bicyclist pedaling at road speed is producing around 75 watts of power. Lance Armstrong supposedly generated 500 watts while climbing hills in the Tour de France.