This essay is compared Nuclear power against Fossil Fuels . In this essay , I will show efficency of the Nuclear energy compared to Fossil Fuels. First of all , Nuclear power is the use of sustained nuclear fission to generate heat and electricity. Nuclear power plants provided about 5.7% of the world's energy and 13% of the world's electricity.The IAEA( International Atomic Energy Agency ) reported there were 439 nuclear power reactors in operation in the world, operating in 31 countries. According to Ewan McLeish in "The Pros and Cons of Nuclear Power," a pellet of nuclear fuel weighs approximately 0.1 ounce (6 grams). However, it can yield the amount of energy equivalent to that generated by a metric tonne of coal, which makes it much more efficient. Secondly ,Fossil fuels were formed from the organic remains of prehistoric plants and animals. These remains, which are millions of years old, were converted by heat and pressure in the earth's crust into carbon-containing fuels.Both nuclear and fossil fuel power plants produce electricity the same way. The heat generated in these plants is used to generate steam. This steam drives a turbine, which powers a generator that converts mechanical energy to electrical energy.The costs of the production are different. Nuclear takes 1.92 cents to produce one kilowatt-hour of nuclear power. For coal powered plants, it takes 1.88 cents; for natural gas power plants, it takes 2.68 cents; and for oil powered power plants, it takes 3.77 cents to generate the same amount of power. In conclusion , Nuclear energy is much more efficient than energy from Fossil fuels but the cost of nuclear energy not so low . Coal is the cheapest way to produce power . In my view , people need to improve alternative resources of production an electrisity .