假定你是李华，你校最近发起了针对全球污染问题的宣传活动。请你在校报的英语专栏写一封公开信，给同学们提出建议，内容包括：
1.海洋里的垃圾越来越多；
2.空气污染严重；
3.解决方法及建议。
注意：
1.词数80左右；
2.可以适当增加细节，以使行文连贯。

【考点】提纲作文．

【答案】Dear friends，
What we can see is that  there is  more and more rubbish in the ocean and air pollution is still serious，which have badly threatened our health.
In my view，it is high time that we should take action to reduce pollution.Firstly，laws must be made to forbid people from throwing rubbish at will，which may help the ocean become clean soon.What's more，we should plant more trees to get more fresh air.Last but not least，we should improve the awareness of protecting the environment.Only by doing so can pollution problems be paid enough attention to.
Let's take action now.
Yours，
Li Hua