16.The power (力量) of the wind Light winds help us fly kites in spring and cool us in summer. Strong winds take away people's lives. Winds can be friendly or dangerous. They can also work for us.
Wind power is not new. Five thousand years ago, the Chinese first used windmills (风车). In 700 A.D., the Syrians and Persians used them too. In the seventeenth century (世纪), the people of the Netherlands built windmills to get seawater. Now we can use the wind to make electricity (电).
In many countries, wind turbines (风力发电机) are very common (普通的). A group of turbines is called a wind farm. Wind farms are usually in fields (田地).
Wind energy (能源) has several advantages. One advantage is that there will always be wind. Wind power is also clean. It doesn't cause (引起) air pollution (污染). Farmers like wind power because electric companies pay them to use their land. And they can still grow crops (庄稼) and keep animals on their farms.
Wind power also has some disadvantages. One is that turbines are expensive, although the cost has gone down these years. A second disadvantage is noise pollution. This was a greater problem in the past. Today, if you stand under a turbine, you hear only a soft sound. You won't hear turbines at all 100 meters away. For some people, a third disadvantage is visual (视觉的) pollution, but other people like to see turbines turning together.
Today, wind power is growing fast. A lot of countries get their energy from wind. Denmark (丹麦) gets 20% of its energy from wind. China is going to get 26% of its energy from wind in 2030. Perhaps one day, all countries will use this safe, clean energy to make electricity.