1. In 200 B.C., people in China and the Middle East used windmills to pump water and grind grain.
2. The first modern wind turbine was built in Vermont in the early 1940s.
3. Wind farms currently produce enough electricity to meet the needs of more than 600,000 families in the United States.
4. The largest wind turbine in the world, located in Hawaii, stands 20 stories tall and has blades the length of a football field.
5. An average wind speed of 14 miles per hour is needed to convert wind energy into electricity.
6. One wind turbine can produce enough electricity to power up to 300 homes.
1. More than 10,000 homes in the United States are powered entirely by solar energy.
2. Enough sunlight falls on the earth’s surface every hour to meet world energy demand for an entire year.
3. Silicon from just one ton of sand, used in photovoltaic cells, could produce as much electricity as burning 500,000 tons of coal.
4. In the 1830s, the British astronomer John Herschel used a solar collector box to cook food during an expedition to Africa.
5. Albert Einstein won the Nobel Prize in 1921 for his experiments with solar power and photovoltaics.
6. The largest Concentrated solar power (CSP) solar power plant is in the world located in the Mojave Desert of California.
7. The largest photovoltaic (PV) solar power plant in the world is located in Golmud Solar Park in China.Tags: solar power, wind power