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Some fuels that have been found and used throughout history include [[wood]], animal and vegetable oil, [[peat]], [[coal]], and dried dung.
 
Some fuels that have been found and used throughout history include [[wood]], animal and vegetable oil, [[peat]], [[coal]], and dried dung.
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Common fuels today are [[petroleum]] and [[natural gas]].
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Common fuels today are [[gasoline]], diesel, fuel oil and [[natural gas]], along with [[coal]] and nuclear power.
    
Many fuels also have a number of incombustibles, such as ash, that could cause air pollution and have unhealthy or even toxic qualities from fuel production.
 
Many fuels also have a number of incombustibles, such as ash, that could cause air pollution and have unhealthy or even toxic qualities from fuel production.
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