Wind energy is created when air warmed by the sun rises, creating areas of lower pressure that are filled by cooler surrounding air rushing in, creating wind. Around 1-3% of the sun's energy hitting the Earth is converted to wind energy. Modern wind turbines are much more efficient than older designs, able to generate 10 times more power, and work by using wind to turn blades and spin a shaft connected to a generator to produce electricity. While a renewable source, wind energy is dependent on weather and wind conditions and may not always be cost competitive compared to other electricity sources.
7. Do you prefer to use wind power to generate electricity or using fossil fuels source? Why? Do the weather affect the wind energy around us? Do you have any questions? Questions and Answer time
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