Question

mention the merit and demerit using the fuels

Answer 1

merit-- it provides us energy

demerit-- it causes pollution

Answer 2

Merits of fuels:
1. It can be extracted easily at low cost.
2. It can be used up to the last drop.
3. It leaves no ash.
4. It is transported easily through pipelines.
5. It supports many industries mainly petrochemical industries.

Demerits of fuel
1. It is in limited quantity.
2. Extracting and burning fuels causes pollution.
3. It is a non-renewable form of energy.
4. Higher use of fuels leads to global warming.