【全国英语等级考试三级】Unit 3 环境—Conversations3

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Unit 3 Enviroment 环境
Conversations3
Hints:
smogMr. Brown and his son Robert are walking along the river.
Dad, how foggy it is this morning.
Yes, it's a new problem.
A new problem? Why do you say so?
The problem results from smog.
Smog? What is it?
Smog is blended with two words – smoke and fog. It has seriously affected people more than any other type of air pollution.
I see. Look, there are some plastic bags floating on the river.
Some citizens are still ignorant of the environmental protection. It's really a pity. But anyway, public concern over the environmental pollution has greatly increased. There is hope for the future.