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Crude oil:

It is a dark smelly liquid which is a mixture of different substances.
Crude oil straight out of the ground is not much use because there are too many different
substances in it, all with different boiling points.

Most the compounds in crude oil are made from…

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Cleaner fuels:
Catalytic converters are put in cars to reduce the amount of pollution given off by cars.
They work by passing the exhaust gases over transition metals. These are arranged in a way so
they have a very large surface area and this cause the nitrogen oxides and carbon…


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