On the global outlook for energy in 2013, China counted more than 17 reactors built and 32 are in various stages of construction. The Chinese is licensing some of NIASA's technology for the new build. Renewable energy and nuclear power are the fastest growing energy sources - each increasing by 2.5% a year. The fossil fuels will account for about 80% of energy use until about 2040. Natural gas is the fastest growing fossil fuel supported by increased supplies of shale gas. Coal will grow faster than petroleum consumption until after 2030, mostly due to China's increased consumption of coal.