1 creature

2 sunlight

3 destroy, ruin

4 have an impact on smb.

5 daily weather report (forecast)

6 mist

7 lead to a glasshouse effect

8 endangered animal species

9 a huge insect

10 throw on the scrap-heap

11 environment

12 water deficiency

13 survive

14 international cooperation

15 a new term

16 a horrible mess

17 a little

18 weapon

19 habitat

20 population