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There is nothing unusual about energy like coals and oils being consumed, principally because economic development depends on natural resources all the time. But what is happening today is extraordinary judged by the standards of the past. It is energy depletion on a massive scale and this problem is so knotty that should deserve our closer heed. Amongst the diverse factors contributing to the energy crises around the world, governments short-sighted policies and citizens extravagant use of automobiles are probably the two most significant ones. By presuming on their natural resources, quite a few countries, especially developing ones, are eager to develop their economy in order to gain an edge over their rivals. Admittedly, their intensive use of the energy facilitates, to some extent, the developments of other industries in short term. Additionally, the amount of private cars increases at such a breakneck speed that the petroleum used amounts to an intimidating proportion of the natural resources. The consequences are undoubtedly disastrous for human beings. Although countries can boast their growth of GDP, their citizens have to endure the ever deteriorated environment with stinking gas belching from factories and vehicles, polluted water due to fuels infiltrating underground, even ultraviolet radiation in the absence of ozone layer and, therefore, their quality of life is by no means improved. Also, sustainable development can never come into true in this situation, meaning that our descendants can benefit nothing except sterile land and polluted air and water from their ancestors. | 
