Humans have been exploiting energy from the wind since 1000 B.C.E.
Wind is one of the true renewable energy sources on our planet. The wind is still blowing while oil and coal reserves are being all used up. By harnessing wind energy, we are allowing nonrenewable resources to be conserved. The plain cloth used for sailing and to propel boats was the technology of early civilizations. The Persians created the vertical axis windmill that was used to grind grain and pump water for irrigation around 500 C.E. The windmill technology spread throughout Eurasia and more efficient models were made. When the turbine windmill found its way to America in 1850, it was used for farming purposes as well. In the late 19th Century, Charles Brush created the first U.S. turbine windmill that generated electricity. However, the low blade speed of this windmill could only create 12 kilowatts of electricity. Today, the United States has turbines that can produce over 1000 kilowatts of electricity.
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