1.Hand in hand to protect the earth
2.We have only one earth
3.Environmental pollution of trouble
4.Treasure life source of water
5.Don't let the earth cry!
6.Save Our mother!
7.To protect the environment,and protecting the earth,Our responsibility is no failure!
8.Protecting the earth,it is everyone's responsibility
9.Protect the Earth and for future generations a blue sky,clear water,the trees of the world
10.To protect the environment,and protecting the earth,that is,the protection of their own