ELI5-How are fossile fuel made?
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“Fossil fuel” is a very large term in that it applies to many types of substances we would refer to as “fuel”, such as coal, oil, gasoline and so on.
I’m assuming you’re only talking about products derived from oil, like gasoline, diesel, kerosene, and so on.
The process of creating these fuels is called “refining” and involves lots of steps, mostly centered around heating the oil and breaking it down into fractions- each successive step generates another kind of fuel, with the worst- bunker fuel oil, basically one step above road tar at one end and the most refined- like kerosene and jet fuel- at the other.
The process is complicated, but it basically comes down to “boil it in successive stages and skim off part of it each time”.
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