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宾老师班上的孩子们很关心环境问题,他们想为家乡的环境保护出一份力.rn“One big problem today is car emissions(排放),”said Mr. Bing, the history teacher. He was talking to the class about prob?lems in the environment.“If people drive less, and use their bikes more, there will be less pollu?tion.”