给环保局局长的一封信用英语写

Dear Mr. Minister,

My hometown used to be polluted and there were very few trees. However, since our school started the tree planting campaign, we started planting many trees every spring. Now we have over 500 trees in my campus and the air is very clean. In spring, the school is very beautiful with all the trees and flowers. I want you to tell everybody to plant more trees. Thank you.

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72词，简单易懂。