Question

Complete the following sentences. 

1. Nuclear power produces a lot of energy but it is ....

2. Renewable energy  is also called "clean energy” because it is not .....

3. Coal, oil and natural gas are .... , so we have to use them economically. 

4. Biogas is an ... source of energy for cooking in rural area. 

5. Natural resources are not ....., so we mustn't waste them. 

Answer 1

1 dangerous

2 polluting

3 limited

4 alternative

5 renewable 

Answer 2

1, dangerous

2, polluted

3, non-renewable

4, unlimited

5, available