the future of the nuclear energy industry. Arjun Makhijani is president of the Institute for Energy and Environmental Research in the United States. He says the disaster in Japan is historic.

　　This week, the chairman of America's nuclear agency said there is little chance that harmful radiation from Japan could reach the United States. Nuclear Regulatory Commission Chairman Gregory Jaczko also said America has a strong program in place to deal with earthquake threats. No new nuclear power centers have been built in the United States since 1979. That was when America's worst nuclear accident happened at the Three Mile Island center in Pennsylvania. The accident began to turn public opinion against nuclear energy.

　　To support more clean energy production, the Obama government has been seeking billions of dollars in government loan guarantees to build new centers. Presently, about twenty percent of electricity in the United States comes from nuclear energy. But critics say nuclear power is too costly and dangerous to be worth further expansion.

　　German prime minister Angela Merkel said Germany would close all seven nuclear power centers for a moment while energy policy is reconsidered. The European Union is planning to test all centers in its twenty­ seven member nations.

　　Developing nations are less willing to slow nuclear expansion. China said it would continue with plans to build about twenty­ five new nuclear plants. And India, under a cooperation agreement with the United States, plans to spend billions on new centers in the coming years.

　　Japan has made nuclear energy a national priority since the 1970s. Unlike many major economies, Japan imports eighty percent of its energy. The Nuclear Energy Institute said twenty­ nine percent of Japan's electricity came from nuclear sources in 2011. The government planned to increase that to forty percent by 2017.

　　Nuclear plants supply fourteen percent of global electricity. Nuclear energy is a clean resource, producing no carbon gases. But radioactive waste is a serious unresolved(未解决的) issue. So is the presence of nuclear power centers in earthquake areas like the one near Bushehr, Iran.

4.Which of the following countries is the least likely to expand its use of nuclear energy?

A.China. B.India.

C.Iran. D.Germany.

答案　D