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HOMEWORK: Nature: @ What are the main environment problems in your country? @Why should people be concerned about the environment? @How can people protect the environment? These days, there is an issue involving fine dust. The extent of air pollution gets worse than ever. you may know about this, fine dust bring about serious healthy problems such as lung cancer, Alzheimer and so on. So nowadays we can see people who is wearing a mask that have a function filtering dust on the street. We should protest and get a compensation from China. And also we should reduce the expulsion of CO2 ourselves.