如何保护环境?用英语写 句子

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..