2.The amount of waste ____ (decrease) if people started to buy reusable packages.

3.Many fish wouldn't die if factories ____ ( not dump) so many chemicals into rivers and oceans.

4.If people started using cars completely , there ____ (be) much less pollution.

5.If people ___ ( buy) more recycled paper, there wouldn't be so much waste.

6.If we ___ (not bury) chemicals waste underground, we ___ (not pollute) fresh water supplies.

7.Pollution ___ ( not be ) such an issue if government and common people really ___ (care).

8.If the local people ___ ( have) fresh water, they wouldn't have to use polluted water.

9.If I ____(be) the president, I ____ (ban) billboards in cities in order to reduce visual pollution.

10.What __ ( happen) if radioactive material was not handled properly?

11.If we____ (not understand ) environmental problems, we would not be able to do anything about them.

12.If my neighbors (litter)_____ near my house , I would write them a letter complaining about that.

13.If I were you, I (not wait) ____

14.If energy (be) ____ inexpensive and unlimited, many things in the world would be different.

15.If I (have) ___ wings, I (not have to) _____ take an airplane.

16.If the teacher were now here, we.......... him the difference ...... "science" and ' technology".

17.If he.... much money, he ......... a house

18.If the air wasn't dirty, I .......... so much.

19.Water ...... in the lake has made the fish die.

20.Water pollution is the ......... in the lake that has made the fish die.

21.Don't drink that water. It's ..........

22.What can be done to protect people from ....... disasters?

23.The team's success was large .......... to her effort.

24.Acid rain happens........ gases and chemicals mix water in the air.

25.Some marine animals are dangerous to humans