because there are many kinds of fuels
Fossil fuels are rare now as there are not many left but people think they are common because they are used everywhere.
The answer depends on the material. Different fuels have different amounts of heat energy.
I think I understand your question... Fossil fuels are simply fuels made from or containing a substance that was naturally aged and produced by the earth. Oil is a composite that the earth makes over thousands and thousands of years
Different fuels have different calorific values means that the different fuels have different energy contents. The consequence of this is that for a given energy output, more fuel is required with the liower calorific fuel.
Biofuels, Algae fuels ect.
In a fossil fuel is different fuels that have been burned
i think that's she thinks is why do they have to have alternative fuels that's just watse of time
There are 3 different types of fuel. They are solid fuels, liquid fuels and gaseous fuels. Included in there are gas, propane, coal, wood, diesel, hydrogen and kerosene,
fossil fuels is what i think the answer is but im pretty sure its fossil fuels
nothing
Because different fuels need different amounts of Oxygen and heat to ignite.