Scenario description：No littering We can see so much rubbish throw away on the ground that the street looks so terrible and disgusting. The people who littering,says it is convenient,for the reson that they are not willing to find a trash can.Someone even says:China has a large population so that it is hard to ensure no littering.To my point of view,this is the matter of education.At school,we can figur out the mathematical question.But we do not realize littering is a bad behavior.And also it is infectious.If you do,other people will follow you to do.Gradually,no one care about it.And we feel it right and accept this behavior.Sounds like the Broken windows theory. Littering phenomenon is not only the impression of the city.but also is the impression of our own morality.If you hold a positive attitude towards life,you will never do this.Earth is our common home.Everyone should protect the environment to make the city more beautiful,let the sky bluer,and build a better home. That's all.Thanks for listening.If you still litering.Stop right now.