I need the name of an older children's book about the earth getting dirty and animals and aliens clean it up?

the earth gets really dirty and the animals try to clean it up and aliens come to help them. this book is from the 70's. children's picture book.

I need the name of an older children's book about the earth getting dirty and animals and aliens clean it up?
It sort of sounds like "Barbapapa's Ark," but in that the earth became polluted, so the Barbapapa family built a spaceship and took all the animals with them into space and lived there till people noticed the animals were all gone and cleaned up the earth. The Barbapapas were blobby creatures of different colors and they had different talents/abilities -- one was artsy, one was strong, etc.





Used copies and pictures here: http://www.amazon.com/exec/obidos/ASIN/B...