people breath in 21% oxygen 79% nitrogen 0.9% nion ano 0.1 other gases
The element is oxygen.
Millions of people worldwide depend on oxygen machines. As an everyday routine, a part of their lives, oxygen machines provides much needed oxygen for many people that can't breathe on their own without assistance.
Oxygen is used to help people breathe in and out
You breathe out 16.3% oxygen.
Breathe in air ,mainly Nitrogen80% and 20% Oxygen Breathe out Carbon dioxide and Nitrogen
We breathe in oxygen and we breathe out carbon dioxide
Plants produce oxygen through photosynthesis. Plants breathe in carbon dioxide from people and release oxygen for people to breathe and live.
20%
no oxygen is what people need to breathe in.
Why do people breathe ? Plants need oxygen too .
No. Monoatimc oxygen is chemically unstable and is too reactive for people to breathe it safely.
About 16% of the air you expel is oxygen.
Humans breathe in oxygen and breathe out carbon dioxide. Trees "breathe" out oxygen.
The element is oxygen.
No. In space there is no oxygen and oxygen is what you breathe.
Deduction
The reason you cant breathe under water is because people is made to breathe oxygen, water composes oxygen.