急求一篇关于自然环境破坏和保护的英语短文！！！！

写作时完成以下问题：
What things can harm the invironment?
What kind of pollution can you find in our daily life?
What kind of pollution harms our life most?
What do you think we should do to improve our invironment?
What has been done to solve these problems in our town?
例如：No spitting on the ground.
No drawing on public walls.
No smoking in public places.
No throwing cigarette butts around.
No carving on trees and desks.
Don’t cut down trees.
Don’t throw about waste batteries.
Don’t throw litter around.
Take care of trees and flowers.
Take care of animals.
Save water.
Keep off the grass.
Put different rubbish into different dustbins.
Stop pouring waste water into rivers and lakes.
Put waste paper in wastebaskets for recycling.
Pick up rubbish and throw it into dustbins.
再如：
Pollution is a "dirty" word.To pollute means to make things unclean or unfit for using.Nowadays