Renewable energy

Renewable energy

Solar. This type of energy relies on the nuclear fusion power from the core of the Sun. This energy is collected and converted in a few different ways - from solar water heating with solar collectors or attic cooling with solar attic fans for domestic use.

More complex technologies are direct conversion of sunlight to electrical energy using mirrors and boilers or photovoltaic cells.

Wind power. Due to varying temperatures of the Earth's surface when lit by sunlight, the differences of temperature at the Earth's surface causes movement of the atmosphere.Wind energy is used to generate electricity or to pump water, but requires extensive areal coverage to produce significant amounts of energy.

Hydroelectric energy. This form uses the gravitational power of elevated water, lifted from the oceans by sunlight.

Biomass (the energy from plants) is commonly used all over the world.The most popular is the burning of trees for warmth and cooking.Unfortunately this process releases copious amounts of carbon dioxide gases into the atmosphere and is a major reason for unhealthy air in many areas.
Methane generation and production of alcohol for automobile fuel and fueling electric power plants are some of the more modern forms of biomass energy.

Hydrogen and fuel cells.Hydrogen can be burned as a fuel, typically in a vehicle, with only water as the combustion product.
This clean burning fuel means a significant reduction of pollution in cities. The hydrogen can be also used in fuel cells, which are similar to batteries, to power an electric motor. Significant production of hydrogen requires abundant power. The need for energy to produce the initial hydrogen gas, resulted in the relocation of pollution from the cities to the power plants. There are several promising methods to produce hydrogen, such as solar power.

Other forms of energy that can be used to generate electricity are tides, the oceans and hot hydrogen fusion.
Each of these suffers from one or another significant drawback and cannot be relied upon to solve the upcoming energy production.

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