Wind-know+how

= How Wind Energy Works = Matt Restuccia

=== Harnessing wind energy is the cleanest, most sustainable ways to generate electricity. It produces no toxic emissions, and none of the heat trapping [|emissions] contribute to global warming. Wind energy is now one of the fastest growing sources of electricity in the world/ Wind power has been used for generations, it is both old and new. All the way from the sailing ships of the Ancient Greeks, to the grain mills of pre-industrial Holland, and at last, to the high-tech wind turbines used today. Since the Earth's surface us made up of different types of land, it absorbs the sun's heat at different rates. The machine that harnesses wind energy is called a Wind Turbine. The turbine blades are designed to capture the kinetic energy in the wind. The blades start to move, and they spin a shaft that leads from the hub of the rotor to a generator. The generator turns that [|rotational energy] into electricity. ===

__ Daily Wind Cycle __
=== Air above the land heats up more quickly than land over water. The warm air over the land expands and rises, causing the heavier, cooler air to rush in and take it's place, creating wind. At night, the winds are reversed. The kinetic from the wind can be changed into other forms of energy. Wind blows as long as the sun shines. ===



Today's wind turbines have the same principal as the old fashion windmills. The wind that comes flows over the blade, that creates lift, but today's wind turbines main job is to create electricity.
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