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5. How do we know that the fossil fuel burning was done by humans?
6. Besides greenhouse gases, list three other factors that could conceivably account for a warming atmosphere.
5. Fossil fuels are the natural resources of energy but on the other hand, these fossil fuels are also one of the major causes of carbon dioxide. Regarding the recent climate change and global warming in the world, carbon dioxide is playing an important role and most of the carbon dioxide is coming from the burning of fossil fuel. This fact has been proved by the isotopic study of the atmospheric carbon, that most of the carbon dioxide is coming from the burning of fossil fuel. And as a matter of fact, the human is the only intelligent and conscious animal living on this planet, who can utilize the natural resources for his/her own benefit. Hence it is proved that fossil fuels are burning by the human.
6. Excess amounts of fossil fuel burning at releasing carbon dioxide and other minute air pollutants are one of the major causes of global warming. Deforestation and destroying the rain forest can cause severe global warming in the recent future. Besides these excess amounts of water vapour in the atmosphere can also cause global warming, because water has the maximum specific heat capacity which can trap a huge amount of heat in it. Have you ever noticed a bitter hotness on a cloudy day!! Now a days scientists are xpecting that extreme weather can also cause global warming.