Answer:
firstly fossil fuels are non renewable source of energy so It will eventually run out but untill then the prixe of fuel will keep rising
secondly the amount of fossil fuel burned will affect the carbon cycle which will lead to major climate change in the future if the use of fossil fuel stays the same
1.lead to increase in global temperature
2.sea level will rise
3.animals won't be able to adapt to the quick change leading to endangerment and extinction
4. both human and animal health will be greatly impacted