What is the name of this book? 10 pts!?

I read it in junior high or late elementary. It is about a boy(?) who lives on the moon(?) because they had to move away from Earth (pollution?). It is written like your typical apocalyptic/Geroge Orwell type book though it may have been geared towards a younger audience. The main character was definetely school age because one part of the book describes what he sees out the school room window or sees around the school yard. He may have been British also? I remember that they may have also made a movie out of it too. It would have been made somewhere between 1970-1999. Any clues? Thanks!