Green energy, also known as clean energy, can be divided into two generalities narrow and broad.

Green energy in a narrow sense refers to renewable energy similar as hydro, biomass, solar, wind, geothermal and ocean energy. These energy sources can be replenished after consumption with little pollution.

In a broad sense, green energy includes the selection of energy sources with low or no pollution to the ecological terrain, similar as natural gas and clean coal( converting coal into coal gas or" coal" through chemical responses, through high- tech technically tightly controlled combustion into electricity) and nuclear energy, to name a many.

1. Wind power generation

Wind is a truly clean energy source, with endless sources and no adulterants like other fossil energies. Wind power is the fastest growing energy source in the world, and because the technology is fairly simple, it's a good coadjutor in mollifying climate change.

Wind is cheap energy. Now, wind power can be delivered to the grid for final use by consumers. Wind- powered turbines are cheap and innocent by reactionary energy prices.

Wind is also not like fossil energies that need to be uprooted, drilled or transported to power shops. reactionary energies are being booby-trapped less and less, prices are rising, and the cost of wind power is falling due to technological progress.

2. Solar energy

The warmth of the sun gives us everything we need for life, and now it provides an endless sluice of clean energy. Solar energy directly converts sun into heat and electricity.

In addition to common small appliances, similar as computers, which can use solar energy, they can also give electricity to areas without grid power. further and further structures are also using rooftop solar cells as a selling point to promote environmental protection and energy conservation.

There are two types of solar energy, one is photovoltaic energy and the other is solar thermal energy. Light energy is converted into electricity, which is generated by semiconductor accoutrements that release electrons( negative patches).

All photovoltaic cells have at least two layers of semiconductors, one positive and one negative. When light hits the semiconductor, the electric field created between the two layers of material pushes the electrons to move, producing direct current. The stronger the refulgence, the lesser the current.

3. Hydroelectric power generation

Water is continuously replenished through the earth's water cycle system, so it's also a form of renewable energy. Unlike solar and wind power, which is intermittent, hydropower can induce electricity continuously 24 hours a day.

The energy of water can come from swells and gutters.

4. Tidal power generation

The World Energy Council estimates that runs can induce 2 megawatts of energy per time. This is twice the current total electricity product in the world and is original to the energy affair of,000 large reactionary energy and nuclear power shops.

The implicit total quantum of renewable energy in the world's abysses can meet further than,000 times the world's current energy requirements.

But until now, the use of runs is still in the theoretical stage, and the affiliated technology is still in the exploration and development stage. So estimating how important of the world's energy requirements can be met by runs is still a work in progress.