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阅读理解
First it was an earthquake．Then came a terrible tsunami．These natural disasters killed thousands of people in Japan on Mar．11, 2011．Then a nuclear crisis(核危机)put the island in danger and shocked the world．
Damaged by the earthquake and tsunami, Fukushima Daiichi nuclear plant(福岛第一核电站)has put out dangerous radioactive(放射性的)materials．Experts from several countries are working to control the crisis．
Although the reports say the leak so far will not cause huge health problems, people are worrying about nuclear safety．Switzerland has stopped plans to build new nuclear plants．Germany raised questions about its nuclear future．
As for China, the government has suspended approving(暂停审批)new nuclear power stations and stepped up safety checks at existing plants, Xinhua reported．But it is reported that all nuclear power stations in China are safe．
A nuclear power plant creates electricity．It is a clean energy source．In 1954, the world's first nuclear power plant was built in Russia．From then on, nuclear power has been widely used．
But nuclear power plants have hidden problems．If radioactive materials get into the air or water, they can pollute soil and plants and harm humans and animals．Nuclear accidents, such as the Chernobyl(切尔诺贝利)disaster in 1986 in the Ukraine, have caused great damage to the nearby people and the environment．
Will there be another choice for energy that we can use in the future? In recent years, scientists have found ways to make electricity from sunshine, wind and garbage．
Some scientists say hydrogen(氢气)may be used to create power．Hydrogen is a clean resource to use, and will never disappear．Some car companies have already developed cars powered by hydrogen．But still, the technology for its production is only in early stages of development．
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