energy, with the country's companies accounting for four of the world's five biggest renewable energy deals made in 2016. In 2017, investments in renewable energy amounted to US$279.8 billion worldwide, with China accounting for US$126.6 billion or 45% of the global investments. According to researcher Dr Cornelia Tremann, "China has since become the world's largest investor, producer and consumer of renewable energy worldwide, manufacturing state-of-the-art solar panels, wind turbines and hydroelectric energy facilities" as well as becoming the world's largest producer of electric cars and buses. Renewable electricity overview As of year end 2021 hydroelectric power remains by far the largest component of renewable electricity production at 1,340 TWh. Wind power provided the next largest share with 655 TWh followed by biofuels at 44 TWh. Solar PV power started from a low base of just 152 GWh in 2008 and has grown rapidly since then to reach over 327 TWh by 2021. The overall share of electricity generated from renewable sources based on the figures in the above table has grown from a little over 17% in 2008 to a little over 27.7% by 2021. Solar and wind power continue to grow at a rapid pace. By the end of 2019, the country had a total capacity of 790 GW of renewable power, mainly from hydroelectric, solar and wind power. By the end of 2019, China's hydropower capacity reached 356 GW. China's installed capacity of solar power reached 252 GW and wind power capacity was 282 GW, as of 2020. By 2020, installed power for hydropower, wind, solar and biomass had increased to 385 GW, 299 GW, 282 GW and 35.34 GW, respectively. Sources Hydropower On 6 April 2007, the Gansu Dang River Hydropower Project was registered as a Clean Development Mechanism (CDM) project in accordance with the requirements of the Kyoto Protocol to the United Nations Framework Convention on Climate Change. The project consists of the construction and operation of eight run-of-river hydropower plants providing total capacity of 35.4 GW, which will generate an average of 224 GWh/year. The project is located in Dang Town, Subei Mongolian Autonomous County, Gansu, China, and was certified by the National Development and Reform Commission (NDRC) to be in compliance with the "Measures for the Operation and Management of Clean Development Mechanism Projects in China". The power generated by the project will be sold to the Gansu power grid which is part of