Relacionar Columnas The weatherVersión en línea Let's learn about the atmosphere por Daniel Educaplay 1 Carbon dioxide 2 Nitrogen 3 Oxygen 4 Water vapour Makes up a very small part of the air we breathe. Makes up only 0.04% of the air, but it's very important. Plants need carbon dioxide to make their own food. 21% of the air. Living things need it to live and breathe. 78% of the air. Living things need it to live and grow.