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This is a way the performance of pollution by the positive and negative posters, the people crying and pain expression image and black chimney together constitute the positive and negative form, convey the increase of PM2.5 concentration in the air of harm to us, when we struggle and pain is what we have to pay a price, once again warned us to Protect environment, no pollution and the destruction of the beautiful ecological balance.
LiYufeng YangChao WangMengqiang