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Due to the rapid population growth and development the world is going through, the global demand of energy has increased and is expected to increase by more than 50% by 2030 (BBC.ND) with an annual growth rate of 1.6% (EIA.2011). However, energy demand differs between developed and developing countries whether it’s for power generating or for any other uses including transport and house hold uses. Energy is usually divided into two types, Renewable energy and Non-Renewable energy. The most common sources of energy are the non-renewable fossil fuels that come in form of oil, coal and gas. Although coal shows that most rapid increase since 2000 with an annual growth of 5.5% (International energy agency. ND), it differs from country to country. According to the international energy outlook 2011, 76% of the world coal usage increase is from china. “The stated goal of the Chinese government is to get to a level of development where every Chinese family owns a car. If this were to actually happen it would require more than the world’s total oil production to fuel them” (MineralWeb.com). On the other hand, even though US depended on Coal for generating electricity over 60 years, it had declined by 13% from 2007 to 2012 (EIA.2013). The same situation has been going on in Europe where coal consumption indicated a decease by 32% in 2012 (BBC.2013). Despite the fact fossil fuels have great influence on the economic costs, non-renewable energy can cause in damage to the health of its people and to the environment. According to Stephen R. Connors (ND), “The extraction, refinement, transportation and storage of fuels carries an immense environment burden, as does it ultimate consumption and disposal of waste products”. As a result, natural gas ...

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...nergy demand showed a rapid increase from 2008 to 2035 (EIA.2011), where “More than 85 percent of the increase in global energy demand from 2010 to 2040 occurs among the developing nations, driven by strong economic growth and expanding populations” (EIA.2013). China and India have been among the world's fastest growing economies for the past two decades. From 1990 to 2010. “China's economy grew by an average of 10.4 percent per year and India's by 6.4 percent per year “(EIA.2013). Where Europe and America as developed countires, showed a slow rise due to slow increase in demand. Hence it is concluded that sustainability difference in each country. Although generally, we deduce that even though the energy used nowadays might be sustainable in economic aspect of the world, it has an immense negative impact on the environment and the health of the societies worldwide.
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