Low-carbon technologies can be divided into three categories: the first category is carbon reduction technology, which refers to energy-saving and emission-reduction technologies in the fields of high energy consumption and high emission, clean and efficient utilization technology of coal, exploration and development technology of oil and gas resources and coalbed methane, etc. The second category is carbon-free technologies, such as renewable energy technologies such as nuclear energy, solar energy, wind energy and biomass energy. In the past 10 years, global solar's battery output increased by 38% annually, exceeding the IT industry. During the financial crisis in 2008, the installed capacity of global wind power increased by 28.8% against the trend. The third category is carbon removal technology, typically carbon dioxide capture and storage (CCS).