natural fuels

How Are Fuels Classified?

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How Are Fuels Classified? Fuels may be classified as follows: Based on their occurrence, they are classified as natural fuels and artificial (or prepared) fuels. … Based on their state, they are classified as solid fuels, liquid fuels, and gaseous fuels. What is a fuel give two examples? Primary (natural) Secondary (artificial) Solid fuels wood,

Do Fossil Fuels Form Quickly?

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Do Fossil Fuels Form Quickly? Do fossil fuels form quickly? nonrenewable resource How long does it take for fossil fuels to form? The transitions from these source materials to high-carbon fossil fuels typically requires a geological process of millions of years sometimes more than 650 million years. Does fossil fuels take a long time even