Currently, electrical energy generation in the world relies heavily on coal, oil and natural gas. Fossil fuels are not renewables as they are derived from limited resources which are being gradually used up. In contrast, renewable energies, such as wind and solar energies are being used as alternatives that never dry up. Most renewable energies are obtained from the sun, both directly and indirectly. Sunlight or solar energy can be utilized to warm and light houses and other buildings, generate electricity, heat water, and for solar heaters. This type of energy has also economic and industrial usages. Not all renewable energy resources are derived from the sun. Geothermal energy is the gateway for the internal heat of the earth for various applications including generating electrical power and heating and cooling buildings. Also, oceanic tidal energies are derived from the gravitational pull of the moon and the sun on the earth. This study now investigates the usages of solar energy.
