1. Resources present in unlimited quantity in nature and are not likely to be exhausted by human activities are called

2. Coal, Petroleum and natural gas are examples of

3. Naphthalene balls used to repel moth and insect is derived from

4. CNG is the abbreviated form of

5. The slow process of conversion of dead vegetation into coal is called

6. In India petroleum deposit was first found in the state of

7. Use of CNG in automobile is better than petrol because it is

8. To reduce fuel consumption in automobile one should

9. Black gold is actually

10. The earth’s temperature is increasing due to Global warming which is due to