Nuclear Energy has come under the spotlight after the Japanese nuclear plant disaster with people focusing on the strengths and weaknesses of nuclear power.One of the most important aspects of nuclear based power is that it is highly efficient.Nuclear Energy is currently the most efficient power source in terms of the fuel required,land area needed and also the waste it produces.The reason for this is that nuclear based electricity is primarily produced from nuclear reactions while other forms of energy like natural gas,coal and oil use chemical reactions.Other such as wind energy convert mechanical energy into useful energy.Nuclear Power currently is mostly produced through nuclear fission as nuclear fusion is still in infancy and its not certain that mankind will be able to use nuclear fusion in a safe manner to generate energy.