Why do we rely on geothermal, wind, solar and water energy sources?

One Response to Why do we rely on geothermal, wind, solar and water energy sources?

1. Marilou Smith says:

   August 6, 2012 at 1:44 am

   The sun not only gives us light at daytime but it is a major renewable energy source. In fact even in the old times they already harness the power of the sun for hot water and power for some appliances with solar panel. Aside from the sun we also generate renewable energy from the wind. Turbines converts to electricity the force that the wind turbines collect from the wind.

   Geothermal power is cost effective, reliable, sustainable, and environmentally friendly,[2] but has historically been limited to areas near tectonic plate boundaries. Recent technological advances have dramatically expanded the range and size of viable resources, especially for applications such as home heating, opening a potential for widespread exploitation. Geothermal wells release greenhouse gases trapped deep within the earth, but these emissions are much lower per energy unit than those of fossil fuels. As a result, geothermal power has the potential to help mitigate global warming if widely deployed in place of fossil fuels.

   Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity, wind mills for mechanical power, wind pumps for pumping water or drainage, or sails to propel ships.

   When waterfalls are sourced for energy, normally it is through Hydropower which uses water turbines for the utilization of the kinetic energy that the water brings from the top of the waterfalls.