To protect the earth,we can do many things.We must not pollute the water and the air we are consuming.We must not anyhow chop trees for making furniture.When communicating with friends far away,try to use paperless method.like e-mail.In the working office we must use less paper for printing.When buying take away meal,we must try to bring our own utensil and not to rely on one-time chopsticks or styrofoam package.