Saturday, December 13, 2008
Uranium is a valuable chemical element. Why causes it so valuable? Its isotope, U-235, has great energy. During the nuclear fission reaction, it releases great energy. The energy that a kilo of uranium can make is more than thirty carriages of coal. In addition, uranium polutes the environment less than burning fuel. Because of those resault, uranium can be the best fuel to make electricity. In the USA, 20 percent of electricity is made by nuclear power. Uranium can also produces nuclear weapons. The famous nuclear weapon, atom bomb, have destroyed the city terribly. Unfortunately, nuclear power produces lots of waste materials, too. The waste materials are radioactive. They make great polution to earth. Plus, refining U-235 from uranium is hard and expensive. Above the synthesis, the uranium is still very valuable.