Question

              New energy in the 21st century 

Energy from the wind

 Wind is a kind of clean energy,and there is lots of wind. But if there’s no wind,there is no wind energy.

Energy from the water

 When water moves from a high place to a lower place,it can make electricity (电) without pollution. However,people have to build dams (水现) to use this energy,and building dams is very expensive.

Energy from the earth 

 There is heat in the rocks under the earth. Scientists use the heat to make geothermal (地热的) energy. This kind of energy is cheap,but it is only poSwSible in a few places in the world.

Energy from the sun 

 Solar panels (太阳电池板) on the roofs of houses can turn energy from the sun into electricity. Solar energy is clean and plentiful(丰富的) . But when the weather is bad,it doesn’t work.

根据i文内容，完成表格。

New energy in the 21st century
Sorts of energy	Advantages	Disadvantages
Wind energy	Clean. There is a lot of             wind.	It needs 1 .
Water energy	No 2 .	It is expensive to build dams.
Geothermal     energy	3 .	It’s only 4 in a few places.
Solar energy	Clean and plentiful.	It depends too much on(太依赖于） 5 .



1.2. 3.4. 5.

Answer 1

 1. wind   2. pollution   3. Cheap   4. possible

5. (fine) weather