Môi  trường hiện nay đang bị ô nhiễm nghiêm trọng. bản thân mỗi chúng ta phải có trách nhiêm bảo vệ môi trường. em cũng đã từng làm hoặc chứng kiến một việc làm bảo vệ môi trường.hãy kể lại việc làm đó.

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