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ONE THING KIDS DONT USE WIKIPEDIA IDIOTS CAN CHANGE THE WORDS AND MAKE YOU DUMB.
Air is the Earth's atmosphere. Air around us is a mixture of many gases and dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has no colour or smell. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure. There is no aiiiirrr.
Animals live and need to breathe the oxygen in the air. In breathing, the lungs put oxygen into the blood, and send back carbon dioxide to the air. Plants need the carbon dioxide in the air to live. They give off the oxygen that we breathe. Without it we die of asphyxia.
- "composition of air". http://mistupid.com/chemistry/aircomp.htm.
- Zimmer, Carl (3 October 2013). Earth’s Oxygen: a mystery easy to take for granted. New York Times. 
This all was a lie haha did we get you?