How are we going to make our city cleaner and more beautiful

Our city is where we study and live,its beauty and tidy is very important to us.So,what should we do to achieve this goal to make our city cleaner and more beautiful?
First of all,I think we should take care of our hands and mouth.Don't throw litter or spit everywhere!Second,planting trees and flowers can make our city like a beautiful garden.Third,we must chrish the things in the public and don't damage them.Besides,some advertisement can be made to notice every person to be good to our city.
At last,I want to say that,if we all love our city,and then take action to protect her appearance,then we will all have a wonderful living environment~!