nowadays petroleum and coal are used as main energy， but as finite non-renewable energy that would be given out some day。 and fueling these may cause a series of environmental problems。 however nuclear energy is a new unexhaustible new energy， it does no harm to environment and has a wide developmental prospect。 though we can no
Now the world mainly oil, coal as energy use, but as limited non-renewable resources, always have spent a day, and burning coal later produce a series of environmental problems. Bu
