All living things need air
The Earth’s atmosphere is made up of air. Air is a mixture
of different gases. The main gases are nitrogen, oxygen
and carbon dioxide. All living things need air to survive.
- Animals and people need air to breathe. We breathe oxygen into our lungs and breathe out carbon dioxide. Fish take in air from water through their gills. Aquatic mammals, such as whales and dolphins, come to the surface of the water to breathe in air.
- Plants need carbon dioxide from air to make their food. They release oxygen into the atmosphere.
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