我要关于应该怎么保护环境的英语句子.越多越好.

We should pick up some rubbish and throw it into a dustbin.
We should collect waste paper or bottles for recycling.
We should plant trees or flowers in or near our neighbourhood.
We should do something useful to improve the invironment.
We should not throw any litter onto the ground.
We should not draw pictures on public walls.
We should not spit in a public place.
We should not cut down trees..