a fuel such as coal, gas or oil that is produced by the gradual decay of animals or plants over millions of years
Fossil fuels currently account for about 90 per cent of world energy consumption.
The world's heavy reliance on fossil fuels contributes to environmental issues.
Scientists explore alternative energy sources to replace fossil fuels.
The consequences of burning fossil fuels are a topic of global concern.
Policies aim to reduce the dependency on traditional fossil fuels.
