Talk:Earthbending/@comment-4142759-20110713135200/@comment-24.21.124.97-20110726063538

It probably means Earth as in the stuff that Earthbending works on, so since the Moon is made of rock and dust it would work there too.

Come to that, there's no reason to believe that the Avatar planet is the Earth. No one ever mentions the planet's name, just referring to it as "the world", and the geography and the flora & fauna are totally different.