Directions: For this part, you are allowed 30 minutes to write a short essay based onthe picture blow. You should start your essay with a brief account of the impact of air pollution and thensuggest how to make the air cleaner. You should writeat least 120 words but no more than 180 words.
参考范文：
From the pictureabove, we can see that people are coughing in the polluted air. With airpollution worsening than before, pm 2.5 has become a usual word for us. Needless to say, people do not like this word, as the content the word representsdoesgreat harm to people's health.
As the polluted airdoes affect our health, we should take some measures to make the air cleaner.Onthe one hand, we should take mass transit instead of driving a car.According toa recent study, vehicle exhaust is a main source of air pollution,so if vehicleexhaust reduces, the air will become cleaner. On the other, more trees shouldbe planted to absorb the tiny dust in the air, which surely will make the aircleaner.
Protection of theenvironment needs constant efforts by every people on the planet. Only in thisway can we have cleaner air and more livable environment.