1. Everybody knows about such environmental problems as …
2. To my opinion, pollution is the most… of them.
3. Cars and factories put too much… into the air.
4. Carbon dioxide… the sun’s heat and the Earth… .
5. So air pollution causes… .
6. As the result of global warming, ice at the Poles… and sea levels… .
7. The weather is getting… .
8. There are stronger… and longer… .
9. In some places it is hard to grow… and find drinking … .
10. Discharge of poisonous substances also causes … that kill fish and sea animals.
11. Ozone holes is the result of … too.
12. Ozone layer protects the Earth from … but nowadays it needs protection itself.
13. Disappearing … is another essential problem.
14. People cut down trees for… and… .
15. When forest is chopped down, the soil is… by the wind and is …away by … .
16. So the rainforest becomes a … and millions of species lose… .
17. People hunt and kill … .
18. Tigers’ bones and rhinos’ horns are used in … and are sold for thousands … .
19. Between 1930 and 1970 the number of … in India … from 40.000 to 2.000.
20. I think people must stop… rare animals for their fur, … and… .
21. It is not late to change the world and to make it… .
22. To stop global warming we must use less… .
23. Scientists work hard to lessen … , but everybody must take care of … .
