1. A good alternative to biogas is

2. Pick the incorrect pair

3. Natural gas, petrol and coal are this type of fuel

4. Solar energy transducer is

5. An ideal good fuel can be attained from

6. Non-renewable resource is

7. Petroplants was recognized first by

8. Maximum energy can be extracted from wood through

9. This is a major source of liquid hydrocarbon

10. These bacterial groups are exploited in the production of biogas