What are the sources of alternative energy?

Biomass energy Biomass energy refers to living or just dead organic matter that can be used as fuel or industrial raw materials. Biomass energy is most commonly used in biofuels made from plants or animals or plants, and is used to produce fibers, chemicals and heat energy; It also includes fuel made from biodegradable waste; Except for those organic substances that have deteriorated into coal or oil.

Many plants are used to produce biomass energy, including Miscanthus, switchgrass, hemp, corn, poplar, willow, sugarcane and palm trees. Some specific plants are usually not very important end products, but they will affect the processing of raw materials. Because the demand for energy continues to grow, the biomass energy industry is also rising.

Although chemical fuel is an ancient biochemical energy, it is not considered as a kind of biomass energy because the carbon contained in it has been out of the carbon cycle for too long. Burning chemical fuels will release carbon dioxide into the atmosphere.

For example, some recently developed plastics made of biomass energy can be degraded in seawater, and the production method is the same as that of ordinary fossil plastics, with lower production cost and meeting most minimum quality standards, but the service life is shorter than that of ordinary waterproof plastics.

Wind energy Wind energy is an available energy source provided to human beings due to the work done by airflow. The kinetic energy of airflow is called wind energy. The higher the air speed, the greater the kinetic energy. People can use windmills to convert kinetic energy of wind into rotary motion to drive generators to generate electricity. The method is to transfer the rotating power of the rotor (composed of pneumatic blades) to the generator through the transmission shaft. By 2008, the world's wind power generation is about 94 1 10,000 kilowatts, and the supplied electricity has exceeded the world consumption of 1%. Although wind energy is not the main energy source in most countries, it has increased more than fourfold from 1999 to 2005.

Modern uses turbine blades to convert the mechanical energy of airflow into electrical energy and become a generator. In the middle ages and ancient times, windmills were used to grind grain or pump water.