China is also the world's leading investor in renewable energy and its commercialization, with $52 billion invested in 2011 alone; it is a major manufacturer of renewable energy technologies and invests heavily in local-scale renewable energy projects. By 2015, over 24% of China's energy was derived from renewable sources, while most notably from hydroelectric power: a total installed capacity of 197 GW makes China the largest hydroelectric power producer in the world. China also has the largest power capacity of installed solar photovoltaics system and wind power system in the world. Greenhouse gas emissions by China are the world's largest, as is renewable energy in China.