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RENEWABLE ENERGY DR. S. S. VERMA DEPARTMENT OF PHYSICS, S.L.I.E.T Challenges for Clean Energy This article is aimed just to highlight the other side of the coin (issues to deal with renewable sources of energy) in order to think and act judiciously before we leap forward without giving a proper thought for the well being of environment and its habitants. With the ever increasing demand of energy and its serious contribution towards environmental degradation from its generation from conventional sources like fossil fuels, clean energy (i.e. renewable energy) is unquestionably important for the survival of human on earth. The energy choices we have already made had huge consequences on our health, our climate, and our economy and the energy choices we will make in the times to come will also make similar effects for decades to come. At one hand when it is important to exploit renewable energy resources at other hand it is also equally important to given serious thought towards their possible disadvantages/ limitations/issues which at present may be long terms consequences but in very near future they may again present an uncomfortable environment on Earth for the living and survival of mankind. By taking these issues into account, it will be better to develop renewable energy technologies so that the exploitation of renewable energy resources on a mass scale remains user and environment friendly. This article is aimed just to highlight the other side of the coin (issues to deal with renewable sources of energy) in order to think and act judiciously before we leap forward without giving a proper thought for the well being of environment and its habitants. Renewable energy Currently there is great interest in development of renewable energy sources due to the prospect of the all available of reserves of fossil fuel getting depleted and the environment pollution caused by burning of fossil fuel. However there are some disadvantages of using renewable energy. These are described below. Hydroelectric energy: • Hydroelectric plants are very expensive to build, and must be built to a very high standard. • The high cost means that plants must operate for a long time to become profitable. • The creation of dams can also create flooding of land, which means natural environment and the natural habitat of animals, and even people, may be destroyed. • The building of dams for hydroelectric power can also cause a lot of water access problems. • The creation of a dam in one location may mean that those down river no longer have control of water flow. This can create controversy in places where neighbouring countries/states/districts/ people share a water supply. • Can have a significant environmental impact. • People can lose their homes. • Can be used only where there is a water supply. • Affects ecology by the process of vegetation decaying, which is releasing methane, which is also responsible with the greenhouse effects. • Flooding is another problem caused by the dam releasing. • Can cause the flooding of surrounding communities and landscapes. • Dams have major ecological impacts on local hydrology. • Large dam construction has been linked to increased propensity of earthquakes. • When water flows, it has the ability to transport particles heavier than itself downstream. This has a negative effect on dams and subsequently their power stations, particularly those on rivers or within catchment areas with high siltation. • Because large conventional dammedhydro facilities hold back large volenergetica INDIA · MAY | JUN16 53


energetica-india-57_asiapowerweek
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