Uranium

Uranium is a valuable chemical element. 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 compartment's coal. In addition, the uranium pollutes the environment less than burning fuel. Due to this, uranium is the best fuel to make electricity. In the USA, 20 percent of electricity is made by nublear power. Uranium is also used in the production of nuclear weapons. The famous nuclear weapon, the atom bomb, destroyed two cities terribly.Unfortunately, nuclear power produces lots of waste material, too. The waste material is radioactive. They can tribute to the pollution of the earth. Plus, refining U-235 from uranium is hard and expensive. Although uranium these defect, it is still very valuable.