关键词 Key Words:

World Environment Day (June 5th each year)
pursue the strategy of sustainable development      industrial solid wastes    water and soil erosion   forest coverage     natural ecosystems   acid rain   nitrate dioxide (NO2)    motor vehicle exhaust    lead-free gasol greenhouse effect   red tide  environment-friendly products  white pollution
　

结合你所生活城市的现况，思考下面的口语问题：

What should government do to reduce pollution and protect the environment?
What can we do? Why didn't we do?
What is the environmental protection common sense we must know?
What is the worst have you done?