Write two disadvantages of burning fossil fuels.

The main reasons to avoid the use of fossil fuels as sources of energy:

1. Fossil Fuels cause heavy environmental pollution on being combusted as they emit carbon dioxide and other pollutants in air.

2. Fossil fuels are limited or finite in quantity and hence their use should be limited to save it for future.

3. Incomplete combustion of fossil fuels causes liberation of carbon monoxide which is highly injurious to health.