Ответьте на вопросы:
1. What is global warming?
2. What is greenhouse effect?
3. What activities are unfavorable and change the composition of the biosphere and the Earth's heat balance?
4. What can prevent the developing of greenhouse effect?
5. Why are water circulation patterns changing?
6. What might cause disappearing of large areas of coastal land?
7. Does the warming affect biological communities?
8. Is there a correspondence between greenhouse effect and global warming?