fossil fuel
noun/ˈfɒsl fjuːəl/
/ˈfɑːsl fjuːəl/
[countable, uncountable]- fuel such as coal or oil that was formed over millions of years from parts of dead animals or plants
- Carbon dioxide is produced in huge amounts when fossil fuels are burned.
- Fossil fuel reserves are rapidly being depleted.
- Gas is the only fossil fuel without environmental problems.
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fossil fuel