By Helga Fritsch, Werner Platzer, Wolfgang Kühnel, Helmut Leonhardt, Werner Kahle
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41 CHAPTER THIRTEEN Working Together All energy programs have advantages and disadvantages. Many people see issues differently, but if people work together, they can find responsible solutions. S. Department of Energy, the World Wind Energy Association, and the American Wind Energy Association work hard to support growth in renewable energies. Power companies do their part too. With continued research and improved technology, wind energy will become more efficient and less expensive. Then, more people will be able to take advantage of this free, clean, and renewable energy, and the planet will benefit too!
Electricity turns the blades of a fan and generates wind. Wind turns the blades of a turbine and generates electricity. 30 31 CHAPTER TEN Wind Farms What happens when you group several wind turbines in one location? You create a wind farm. Wind farms generate electricity for power grids. Power grids distribute electricity to many homes and businesses. Wind farms may have a few turbines, or hundreds of them. Depending on the number of turbines and their size, a wind farm generates enough electricity for hundreds, or even thousands of homes.
Fuel for Thought What is the world’s wind power capacity? 8 gigawatts at the end of 2007. 37 CHAPTER TWELVE Advantages and Disadvantages Wind energy has many advantages. The biggest advantage is that wind energy is green energy.. Green energy is friendly to the environment. Wind turbines do not burn fuel. Therefore, they do not release harmful emissions into the air. Of course, wind turbines need wind to generate electricity. That is one of wind energy’s disadvantages. Many places in the world do not have sufficient winds to support a wind farm.