fossil fuels
nounUK /ˈfɒs.əl ˌfjʊəlz/
US /ˈfɑː.səl ˌfjʊəlz/
Fossil fuels are fuels like coal, oil, and gas that come from very old plants and animals buried deep in the ground.
Cars and factories often burn fossil fuels, which can harm the air.
RELATED WORDS
OTHER MEANINGS
2. Fuels formed from the remains of ancient living things over millions of years.
Scientists study how fossil fuels formed from ancient sea creatures.
3. Energy sources that are burned to make heat or power.
Many power plants use fossil fuels to make electricity.
4. Resources that are limited and cannot be quickly replaced.
Because fossil fuels take millions of years to form, they are not renewable.