Through the centuries, humans have found innovative methods to harness the power of the sun with solar energy .Solar energy technologies make significant contributions to the solutions of the most critical problems the world now faces. Solar technology converts sunlight into electricity using photovoltaics (PV). A photovoltaic is a solar cell that converts light into electric current using photoelectric effect. Solar powered vehicles are the first step towards developing environment friendly vehicles with solar power technology. Nowadays even four wheelers have eco friendly tyres for the eco-conscious car owners.
Beneath the outer surface of the earth the temperature gradually increases the closer you get to the molten core. Geothermal technology permits the explotation of this thermal energyGround source heat is a different type of geothermal energy.At one or two metres under the surface, the temperature of the earth has a tendency to remain incessant, with one or two degrees of change between the air and surface temperature.
This recurring source of heat can be harnessed by ground source heat pumps.Ground source heat pumps work by removing the low temperature heat near the surface, which is between 8C and 14C in England. A heat pump is used to transfer the heat from the ground thru a pipe buried in the ground and full of liquid to take in the heat, which is then distributed to the heating system for a building.