根据前面的英语，写出汉语意思。（答案在后面）

1.  acid rain___________________________

2.  vehicle___________________________

3.  soil___________________________

4.  make a change___________________________

5.  heat waves___________________________

6.  urban___________________________

7.  loose___________________________

8.  blow___________________________

9.  global___________________________

10.  sustainable___________________________

11.  pollute___________________________

12.  force___________________________

13.  smog___________________________

14.  tie___________________________

15.  realize___________________________