The use of renewable energy has attracted worldwide attention

Renewable energy is clean energy, including wind energy, solar energy, biomass energy, etc. Since the 1990s, renewable energy has developed rapidly. Many countries in the world use renewable energy as the basis for energy policies. It is understood that the European Union's energy white paper defines the goal that by 2010, 12% of the European Union’s electricity generation will come from renewable energy sources. The goal of Denmark is to reach 35% by 2030. The United Kingdom will bring the proportion of renewable energy needs to 20% by 2020. The United States and Japan announced that they will focus on developing clean renewable energy sources. Some developing countries such as China, India, Indonesia, and Brazil have increasingly emphasized the importance of renewable energy to meet future development needs.

Among renewable energy sources, wind energy is currently the fastest growing energy source and has been growing at a rate of 25% to 30% per year over the past five years. According to reports, the installed capacity of wind power in the world reached 30,000 MW in 2002. German wind power has developed the fastest. Currently, the installed capacity has exceeded 12,000 megawatts, while the United States has also reached more than 4,500 megawatts. Other countries with rapid development of wind power mainly include Spain and Denmark. China, India, the United Kingdom, and New Zealand also have considerable potential.

Biomass energy currently accounts for 11% of the world's total energy use, but in part comes from unsustainable harvesting. Relevant departments expect that by 2020, the commercial use of biomass energy in the world will reach 100 million tons of oil equivalent, and the production capacity of biomass liquid fuel of 10 million tons will be formed. According to estimates by the United Nations Development Program (UNDP), the potential for sustainable biomass energy is enormous and can meet more than 65% of the current global energy demand. 20% of Finnish energy needs can be provided by biomass energy. According to a report from the German Institute of Applied Ecology, by the year 2030, about 14% of energy demand in Germany will be met by biomass energy.

There is great potential for mixed combustion of biomass and coal. This technology is not only simple, but also can quickly reduce carbon dioxide emissions. This technology is quite common in Scandinavia and North America. In the United States, more than 300 power plants use biomass and coal co-firing technologies, with a total installed capacity of 6,000 megawatts.