The power of today's most widely used are taken from the source power supply like fossil fuel lachamphuak fuel raw materials. Coal and natural gas, you never doubt why called "fossil fuel", the answer is that this fuel from plant scrap animal carcasses of the dead for a long time for millions of years. The underground piles until it changes to a fossil from the natural change has become a oil crude. Coal and natural gas, but the problem is not coming as a substitute to use. We need to take a long time as a winger that would trip for each litre oil production. They also cause pollution to the environment. Because of the burning of the fuel will have toxic gases, such as nitrogen, carbon dust, smoke, carbon monoxide, sulfur dioxide, carbon dioxide, and etc.
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