Question

Why do you exhale carbon dioxide and where does it come from?

Answer 1

We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from The carbon in the food we eat.
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We breath in ox

Answer 2

Answer:

We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat

Explanation: