Animal Behaviour Zone
Medical Physics Zone
Space Exploration Zone
Asked by Lucy2004simmons to Peter on 18 Nov 2016.
THAT is a great question! The main reason (I believe) is because the Earth is the only known planet with *plants*, which (through photosynthesis) convert carbon dioxide into oxygen.
View all answered questions
Copyright Gallomanor, produced by Mangorolla CIC 2017
Short link to this page https://ias.im/256.1067