Combustion of fossil fuels generates a lot of air pollution. Can you suggest any two alternative sources of energy which do not cause any pollution?

Fossil fuels generate a lot of air pollution when they undergo combustion. Instead of these, we can use alternative sources of energy like:

1) Solar energy: Solar panels can be installed which would harness or use the solar energy of the sun to run machines or generate power.

2) Wind energy: In wind energy, wind is used as a source of energy. Wind turbines are installed which generate energy when turned.