parapharsing

1) a mixture of smoke and fog - smog
2) gas which is sent out into the air - emission
3) water that falls from the clouds and contains harmful chemicals - acid rain
4) to process used objects so that they can be used again - to recycle
5) to damage sth. so badly that it no longer exists - to destroy
6) weather conditions of a particular place - climate
7) it protects the earth from dangerous rays of the sun - ozone layer
8) lots of trees form it - forest
9) to make air, rivers etc. dirty - to pollute
10) the problem of the rise in temperature of the earth's atmosphere - global warming