The greenhouse gases are the major air pollutants which are not only polluting the air but also causing the atmospheric temperature to rise. In this industrial age of human civilization, human activities are increasing the natural levels of those gases, by emitting carbon dioxide from the burning of fossil fuels such as coal, oil, and natural gas; methane and nitrous oxide produced by agricultural activities and changes in the use of land; and by some industrial gases that are long-lived in the atmosphere. If emissions continue to grow at the present levels, the concentration of carbon dioxide will double those from pre-industrial levels during this century.
A continued increase in atmospheric temperature will make it difficult for the human being to survive on this planet by destroying our environment. With increasing atmospheric temperature, polar ice will start to melt at a very high pace. It imposes a huge threat of losing our land under sea water. Over time, environmental conditions will also become non-conducive for production in the agricultural and industrial sectors of our economies due to adverse climate change. Production of crops will fall drastically that will, in turn, affect industrial production as well.
The economic systems will break down, that will bring in huge turmoil in our societies as well. Hence, to save this planet, the time has come to take appropriate measures for controlling global warming. (Schelling, p. 2-9) The main cause of global warming is regarded as the emission of hazardous gases from vehicles. These gases mainly emit form the burning of fossil fuels that run the vehicles. In this progressive age of human civilization, it would not be possible to make the vehicles stop from running.
Thus it is necessary to search for alternative fuel sources or alternative technologies for running vehicles. In many kinds of literature that talks about the problem of global warming and its remedies, fossil fuel has been appeared to be an appropriate alternative. (Schelling, p. 2-9; Lucas p. 1 )
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