1. If we (recycle) _____ more, we will help the Earth.
2. Factories (not dump) _____ waste into rivers if the government fines them heavily.
3. Students will be more aware of protecting environment if teachers _____ (teach) environmental issues at school.
4. If light pollution ______ (happen), animals will change their behaviour patterns.
5. If people (travel) _____ to work by bus, there will be fewer car fumes.
6. We _____ (save) thousands of trees if we don’t waste paper.
7. If we use water carefully, more people _____ (have) fresh water.
8. The level of radioactive pollution will decrease if we _____ (switch) from nuclear power to renewable energy sources.
9. If the water temperature (increase) _____, some aquatic creatures will be unable to reproduce.
10. People will get more diseases if the water (be) _____ contaminated.
11. If you (be) _____ the president, what would you do to help the environment?
12. They get sick so often. If they (exercise) _____ more, they (be) _____ healtheir.
13. If I had one million US dollars, I (build) _____ more parks in our city.
14. Ngoc’s mother is unhappy. If Ngoc (tidy) _____ her room everyday, her mother (not be) _____ so upset.
15. There isn’t a garden at our house. If there (be) _____, we (grow) _____ vegetables.
16. It (not be) _____ possible to save the Earth if we don’t take action now.
17. If the world temperatures continue to rise, there (be) _____ less snow.
18. If I (be) _____ you, I would wear earplugs when going to the concert.
19. If we do nothing to stop global warming, we (see) _____ big changes in the future.
20. How _____ you _____ (travel) to work if you didn’t have this motorbike?
21. Our garden is so beautiful. There (not be) _____ any flowers if my sister (not take care) _____ it every day.
22. If pigs (have) _____ wings, _____ (they/be able) to fly?
23. If I _____ (be) an astronaut, I _____ (travel) to other planets.
24. If you _____ (not see) Tom ever again, how _____ (you/feel)?
25. What _____ (you/do) if you _____ (see) a ghost?
26. If you _____ (eat) more of this cake, you _____ (be) sick. You’ve already had five slices!
27. Who _____ (you/vote) for if you _____ (be) eighteen?
28. If you _____ (be) late, we _____ (not wait). We’ll have to go without you!
29. If the ozone layer is not protected, we _____ (suffer) from excessive ultraviolet radioation.
30. If you _____ (leave) the lights that you are not using on, you’ll cause over-illumination, a form of light pollution.
31. Soil pollution _____ a serious problem to solve if levels of pollutants in soil go beyond what should be naturally allowed.(be)
32. If your farming land _____ near a landfill or an industrial area, it is essential that you test the soil for pollutants before growing anything adible. (be)
33. You will be less likely to suffer lung cancer if you _____. (not smoke)
34. If it is sunny, we _____ a clean-up of the garden. (do)
35. If local residents _____ cutting trees for wood at this rate, the forest will soon be gone. (keep)
36. If we take good care of the garden, we _____ flowers all year round. (have)
37. If man _____ dumping waste into the sea, they will soon be victims. (keep)
38. We’ll go without Linh if she _____. (not come)
39. If everyone _____ a small contribution, we’ll be able to do a good cause. (make)
