Alternative electric energy has seen a marked increase in investment over recent years. As the world responds to the range of crises presented by global warming, viable solutions are being sought to combat the problem.
Demand for fossil fuels such as oil, gas and coal have led to the depletion of the earth's natural resources. The world's forestry reserves are in trouble too as they are being cut down to supplement energy requirements. Solutions are desperately being sought in order to avert global disaster.
Most alternative electric energy systems are based on very simple technology that is easy to understand. Each of them is based on the concept of harnessing the infinite energy of nature to produce electricity. If more alternative electricity systems could be made use of this could help preserve our finite resources.
There is nothing new about using renewable sources for energy. Many alternative electric energy systems are simply an updated version of old fashioned technology. Sources of energy can be generated using the power of the wind, sun or water.
Windmills used by our predecessors to grind corn or wheat have evolved into the modern wind turbines we see today. Both types of windmill operate on similar principles. Each has large blades that rotate when the wind is trapped in them. The old windmill shafts were connected to a great millstone that would slowly roll as the wind turned the vanes. Newer windmills now turn electric generating turbines instead.
Like wind power, hydro power is an alternative electric energy system that has been around for a long time. Rushing water from rivers was harnessed to turn a wheel that was also connected to a mill. Modern hydro power typically uses the force of water released from a dam to turn the blades of a turbine. Turbines are connected to a generator that produces electricity. Hydro electric power is considered a clean and cost effective alternative energy system for mass usage.
The most popular alternative electricity system for homes, schools and businesses is solar power. The technology used is the most groundbreaking because it harnesses the sun's energy with tiny components called photo voltaic cells. These cells convert the energy into electricity which is able to charge batteries for consumers to make use of as needed. Solar energy is a slightly more complex technology than other alternative electricity systems but it also the most adaptable.
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