The term energy elasticity is used with reference to the energy intensity(a measure of energy inefficiency on the economy) of GDP. Usually, this term has been used to describe sustainable growth in the developing world, to maintain the security of energy supply. For example; China consumes more energy to achieve high growth rate. By 2003 - 4 Chinese energy elasticity approximately 1.5, for every 1 percentage increase in GDP energy demand grow by 1.5 % ( in 1978 - 0.74, 1979 - 0.29)