wind power

For thousands of years, humans have relied on the power of wind to sail across oceans, pump water, and grind grain. About a hundred years ago, the Dutch began to use their powerful windmills to generate electricity. Today, these electricity-producing windmills, or wind turbines, are found in open, windy spots around the world.

Definition: the process of producing electricity
or mechanical energy using the power of wind
Carbon Dioxide Emissions: None!
Cost: cheap (compared to other energy sources)
Location: open, windy areas
Current Use: Wind power provides under 1% of world's electricity. But it's growing 30% per year.
Cool Fact: In Denmark, excess electricity from wind farms is used to pump water uphill. It is then used to power hydroelectric plants.

Image credits: main image, courtesy of Glowimages/AGE Fotostock.