>　　    i think pollution is not only the problem of our city, but also the problem of all the cities in our country and even in the world. and it’s not only the duty of the people in our city, but also of all the people on the earth to protect the environment, because we have only one earth.

　　    do it from now on. do it from every small thing around us. then we will have a more beautiful and cleaner earth.

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