Dear friends，
Do you want to live in a beautiful world?
To fulfill our obligation to protect the environment， we are supposed to follow the following ecological codes.
To begin with，it is suggested/advised that we stick to the habit of walking to school. In addition，we are required to eat at least five kinds of fruits and vegetables a day.
Moreover，it would be a good idea if we recycle everything recyclable and cherish our school’s environment by picking up any litter and turning off the taps and the lights. In a word， it is high time that we should contribute to the prosperity of our mother， the earth.
Thank you!
The Students’ union
20xx年x月x日
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