New Energy in the Twenty-first Century

Energy from the wind

Wind is a kind of clean energy, and there is lots of it, 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(電）without pollution. However, people have to build dams(水壩) 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?zé)岬?energy. This kind of energy is cheap, but itis only possible in afew places in the world.

Energy from the sun

Solar panels (太陽(yáng)電池板) on the roofs of houses can turn energy from the sun into electricity. Solar power is clean and plentiful(豐富的).but when the weather is bad, It doesn’t work.

New Energy in Twenty-first Century

Advantages

Disadvantages

Wind Energy 

Clean .There is a lot.

It needs 1.

Water Energy

No 2.

It is 3.

Geothermal Energy

It’s4.

only possible in a few places

Solar Energy

Clean and plentiful.

It depends too much on5.

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