1.used

2.will help

3.are dumped

4.has settled

5.be caused

6.are destroying

7.have classified

8.is increased/will run into

9.will happen/disappear

10.was watching

11.buying

12.die

7.have classified

8.is increased/will run into

9.will happen/disappear

10.was watching

11.buying

12.die

VI. Write the correct tense or form of the verbs in brackets.

1. It would be better for the environment if more people used bikes rather than cars.

2. If we use less energy, we will help reduce greenhouse gas emissions.

3. Every year, million tons of plastic are dumped into the oceans.

4. A thick smog has been settled over New Delhi since winter began.

5. Noise pollution can be caused by vehicle, aircraft, and industrial noise.

6. Human activities are destroying nature at an unacceptable rate right now.

7. A decade ago, WHO has classified air pollution as a link to lung cancer.

8. If the temperature is increased by a few degrees during the next few years, we will run into serious problems.

9. What would happen if all the pollution in the world disappeared?

10. At 8 o’clock last night, I was watching “A Plastic Wave”, a documentary on plastic pollution.

11. We should avoid buying frozen foods because their packaging is mostly plastic.

12. Air pollution can make people die.