This century will be an era that renewable energy and new energy replace conventional energy to play the leading role. The International Energy Agency forecasts that the proportion of new and renewable sources of energy will be developed to constitute more than 50% of the world's
energy by 2060. Last four years, the global wind power generation has grown at an average annual rate of 65%, and the growth of solar energy is more than 30%, which even exceeded the development of the information
technology industries.