19.破坏/损害/污染环境 destroy/ harm/ pollute the environment
18.人 human being
17.在地球上 on the earth
16.切断供水 cut off the water supply
15.转变成 change into = turn into
14.砍倒 cut down
13.结果 as a result
12.阻止……做某事 keep…from doing sth.
11.阻止……做某事 stop / prevent …(from) doing sth.
10.把土冲走/吹走 wash/blow the earth away