Class 8 Geography Chapter 3 Extra Questions and Answers ...
Advantages of petroleum: (i) It is easier to transport. (ii) It is the basis of petro-chemical industry. Disadvantages of petroleum: (i) Oxygen gets depleted due to oil spillage and gas leakage. (ii) Pollutants released while burning, cause acid rain. Question 34. Write two advantages and disadvantages of firewood. Answer: Advantages of firewood: