31.If you exercise more, you can have a good health.
32.Too many telephone poles,advertising billboards, or the shop signs leads to visual pollutions.
33.If we don't take action immediately,the air will because completely polluted.
34._____because of herbicides.
35____respected the environment, it wouldn't be now in danger.
36.Since the water is contaminated,people get more diseases.
37.Because of breathing in unclean air, my uncle suffered from lung cancer.
38._____attractive if people stop throwing rubbish in the street.
39.Due to the heavy rain,the road in from of my house was flooded.
40.______from too much use of electric lights in cities.
