Relacionar Columnas The weatherVersión en línea Let's learn about the atmosphere por Daniel Educaplay 1 Water vapour 2 Carbon dioxide 3 Oxygen 4 Nitrogen 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. Makes up a very small part of the air we breathe. 78% of the air. Living things need it to live and grow.