Geography of China the triangular North China Plain. The other two sides are the Pacific coast to the east and the Yangtze River to the southwest. The vertices of this triangle are Beijing to the north, Shanghai to the southeast, and Yichang to the southwest. This alluvial plain, fed by the Yellow and Yangtze Rivers, is one of the most heavily populated regions of China. The only mountains in the plain are the Taishan in Shandong and Dabie Mountains of Anhui. Beijing, at the north tip of the North China Plain, is shielded by the intersection of the Taihang and Yan Mountains. Further
China the waste water, waste gas and solid wastes are around 900,000 tons each year from 2005–2011. However, China is 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