1.clean and green is our dream
2.look around,walk around,breathe clean air,and don't litter the ground.
3.keep your city clean and green for the future generations to be seen.
4.yesterday we smoked the green,today we keep it clean.
5.be green or you are mean
6.don't be a litterbug,just give tree a hug
7.keep it clean,keep it green
8.don't litter it makes the earth bitter
9.god gave us green lets keep it clean
10.being green is staying clean
11.live life cleaner.make earth greener
12.lets go green to get our global clean
13.keep your surroundings clean and make the earth green
14.keep your earth clean and green
15.anti-litter,dont be bitter,stop this litter!