Renewable Energy is energy based on resources that are regenerative or all practical purposes can not be depleted. Sources such the sun's rays and the wind, cannot be exhausted and so called renewable. They cause fewer emissions are available locally. Their use can, to some large extent, reduce chemical, radioactive and thermal pollution. They are a viable way to obtain clean and limitless energy. These are the non-conventional sources of energy. The majority of the renewable sources of energy are fairly non-polluting and considered clean with the exception of biomass, a renewable source, is a major polluter indoors.
Reasons for renewable energy or non-conventional energy would be the sun, wind, agricultural residue, firewood and animal dung. Energy generated from the sun is known as solar power. Energy derived from water is named hydroelectricity. Biomass is firewood, animal dung, biodegradable waste from cities and crop residue. It might be a source of energy when it is burnt. Geothermal energy is energy derived from hot, dry rocks, magma, domestic hot water springs and natural geysers. Ocean thermal is energy based on waves and tidal waves.
In terms of renewable energy, the most powerful and useful is the sun. The sun is accessible from sunrise to sunset and produces an unimaginable amount of energy each and everyday. What solar collectors do is always to harness the energy from the sun in the form of radiation being usable forms of energy including heat and electricity, Solar cells in particular converts the sun's energy into electricity. With technology being so advanced, cells are taken to a fresh level. There are recreational vehicles, cell phones and cars.
Solar heating systems depend on a source of bright light, a surface or liquid that will absorb light and a storage device for the resulting heat generated. A greenhouse is a good example of this effect. Solar heat is certainly the cheapest and most practical type of renewable energy in the world. Some practical uses are hot water heaters, ovens, cookers and warming.
Green Living - Wind Energy
From times long, long ago, sailing ships depended on the energy of the wind depict oceans. Likewise wind energy seemed to be used to work windmills for pumping water. Today, wind power is being used as a clean electric source around the world. Wind farms, as they are often called can provide enough electricity for thousands of homes at a time. The effectiveness of wind is used to turn turbines, which in turn is connected to an electrical generator as well as the gearbox inside the generator converts the energy of the spinning turbine into electricity.
Ages ago, waterwheels were used to offer power for grain mills and lumber cutting. Hydroelectricity, as it is called today, produces over 60% of the electricity in Canada and 60% in america.