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
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,
nothing
Because different fuels need different amounts of Oxygen and heat to ignite.
Different density's of crude oil
Not better, just a different application.
wind power blows and fossil fuels are gases
gas, oil and coal
many
What you might use them for