which is the best fuel?? write a report on it.
A fuel is considered good or valuable if It has a low ignition temperature, and It produces a large quantity of heat, that is, its calorific value it high.
Ideal fuels should be easy to store, leave behind little ash after being burnt, and burn easily. Their burning should produce no unwanted by-products. Coal, petroleum and natural gas meet nearly all these conditions. They are cheap, easily available, produce no harmful odour while burning, can be transported easily and their combustion can be controlled.