Fossil fuels are energy sources formed in the Earth’s crust from decayed organic material. The common fossil fuels are oil, coal, and natural gas.
Although fossil fuels are readily available, efficient and reliable; they cause a huge amount of damage to the environment, contributing heavily to the climate change emergency as well as the detrimental knock on effect of pollution on human health.
They’re also a finite energy resource, so once the oil, gas and coal reserves have been completely used up, there’s nothing more left. It’s been predicted that this could happen in the next 50 years.