It is described in the (above) picture above() that a man is catching(handling) an axe before a bent tree ,with stumps around, which seems(is) clearly the only last() one on the wind() land. The sun it setting in(against) the landline(horizon), which makes the whole drawing(picture) full of bleakness.

　　It would be turned(real) true() if the human ourselves are(we human beings)continuing(continue) destroying our forests like that man. It is investigated(reported)that during recent(the last) 10 years, almost 100 varieties(species) of tress has (been) disappeared. With(At) this speed, the earth will be (left without) no() trees and no() animals anymore.

　　What we must do is just protecing(protecting) our environment in which we are living (live). I suggest(propose) 3 measures in the following(as followed):
The first, don't cut tree under 10 years, if we have to do so, plant a new one instead;

　　The second, find new sources of heating and architecture materials, which is the scientists' responbilities (responsibility). 
The last, teach our children the very condition in which we are livng(live) and in order to protect our mother earth, what we must do(the kind of actions we have to take).

　　It is not an easy thing, but we must insist persisting(persist).

　　Sara点评：13分，表达清楚，明确，用词和句式变化较多。但要注意语言的简洁和准确，以免造成不必要的丢分！