Earth's Atmosphere

Earth's atmosphere is contains many elements that most planets don't have. The atmosphere is made up of oxygen,nitrogen, carbon dioxide, water vapor, and particles of liquids and solids. The atmosphere has one percent of other gases. Earth is suitable for living because of how much oxygen it has. The two main gases in the atmosphere are nitrogen and oxygen. Planets like the moon don't have these gases therefor there isn't life on any of them. If Earth's atmosphere didn't have the gases that it does we wouldn't be living here today.