Alternative and Unconventional Energy Sources

"Energy is basic need for all living beings. Initially wood was the source of energy and still used as fuel and light in poor country. Discovery of coal replaced wood to the certain extent. With the development of making electrical power, demand of coal increased and same time amount of carbon dioxide to our environment. Discovery of oil did not replaced coal as power is still produced using coal. With industrial development, requirement of energy was growing very fast. Development of automotive industry, aviation industry and appliances for all type of house hold work, require energy. With increasing population, demand of energy also increased. In last one century, there is large change in transport industry. Discovery of oil, allowed to make different type of vehicles for the transport of man and material. Development of rail, tram and metro system requires energy. Similarly, aviation and shipping industry also requires energy to move fast and transport large quantity of man and material from one country to another country. Large road infrastructure has been developed for the automotive industry"--