环保倡议书英语作文-条据书信 _一 dear friends， i am writing this letter to call on everyone to pay attention to the present disasters caused by human activities. as some of you may know， over the past years， floods， droughts， landslides， and dust storms have frequented our planet. not long ago， tsunami swept the southeast asia， which caused enormous damage. all these have sounded an alarm to human beings. so it is high time that we join efforts to save our planet. above all， a task of
