Question

Answer the following questions in brief.
1. State the main function of a fuel.
2. Give one example each of solid, liquid and gaseous fuels.
3. Why is biogas regarded as a better fuel than cowdung cakes?
4. Why is CNG called a better green fuel?
5. Name the three main fossil fuels.
6. State two disadvantages of fossil fuels.
Answer the following questions.​

Answer 1

Answer 6 = Coal and oil release sulfur dioxide gas.