Why Is Renewable Energy Needed and How Can Alternative Sources of Energy Be Harnessed Effectively?

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Why is renewable energy needed and how can alternative sources of energy be harnessed effectively? Introduction The major source of energy comes from fossil fuels. People use fossil fuels in many fields, such as power electricity, heating, running cars and airplanes and manufacturing. However, using fossil fuels has led to several problems such as pollution produced, non-renewable and also the word demand increased, which is why we need renewable energies. This essay will show the reason why we need renewable energies and two solutions to use them effectively. There are three main problems with the use of fossil fuels. Firstly, although they are the main sources for world energy supply,they are also the main cause of man-made climate change resulting from the CO2 emissions produced. The global carbon budget has shown that 87 percent of all human-produced carbon dioxide emissions come from the burning of fossil fuels like coal, natural gas and oil (Le Quéré, 1107-1157). The consequence of climate change is serious. It will cause sea level rises,more flooding and stronger storm. Secondly, the shortage of fossil fuels is also a big problem, which is means fossil fuels are finite and non-renewable. If people cannot use them reasonably and economically, fossil fuels will be used up very soon. Klass model is a good illustration of this problem and it assumes a continuous compound rate and computes fossil fuel reserve depletion times for oil, coal and gas of approximately 35, 107 and 37 years, respectively (Shahriar & Erkan, 1). Thirdly, the demand of fossil fuels is increasing. The International Energy Outlook expects a nearly 50 percent jump in global energy demand by 2035 (Cristen, 2). Using alternative energies is the best way to deal with all these three problems. It needs government’s power and civic awareness work together. The government should

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