Pros And Cons Of Renewable Energy

1.4 Renewable Energy Sources

Renewable energy sources are defined as are energy sources that are naturally replenished by processes at a rate comparable or faster than its rate of consumption by human kinds. Natural resources such as the wind, sunlight, tides, rain, geothermal heat, and tides are renewable but flow-limited. Nuclear energy and fossil fuels are non-renewable since their fuels are consumed faster than can be generated in nature. Electricity can be generated from roughly a third of all energy resources based on hydro, thermal, chemical, nuclear, the wind, geothermal and solar. The advantage of electrical energy is that it can be efficient, cheaply and easily transported through an electric grid. Today’s generation might not realize, but electricity has made today's modern society possible. Electricity is a sign of progress and modern life.

It now more than 100 years electricity has been practically used. The energy used; to wash, to cook food, to do laundry, watch TV, illuminate the streets and houses, work on computer and air condition is provided by electricity. The living standard of humans is determined by the electricity. Out of 7 billion people currently

This means that though the process of photosynthesis, the world has been using the solar energy of millions and millions of years and converted it into chemical energy and stored in the form of coal, gas, and biomass. The biomass and wood were the main sources of energy back before the industrial revolution. The energy source was replenished in the same was as the energy being consumed. In the pre-industrial era, humankind was basically living on wood and biomass as a secondary form of solar energy. However, this energy consumption did not means it was a fully sustainable way of living. Due to the increasing population density at the end of the first millennium in Europe, deforestation was the problem