The early Earth atmosphere was toxic until the Stromatolites converted it to the nitrogen/oxygen mixture we now have. It is maintained by the trees and algae.
On average, humans breathe in about 21% oxygen from the air.
We breathe in oxygen, which is in the form of O2 molecules.
Around 21% of the air you breathe is oxygen.
No, we do not breathe out oxygen. When we breathe in, we take in oxygen and when we breathe out, we release carbon dioxide. Oxygen is utilized by our bodies during cellular respiration and the byproduct, carbon dioxide, is expelled through exhalation.
Oxygen makes up about 21% of the air we breathe.
Humans breathe in oxygen and breathe out carbon dioxide. Trees "breathe" out oxygen.
You breathe in oxygen.
Yes you do. See we breathe in oxygen and we breathe out carbon dioxide. Plants are the opposite. They breathe in carbon dioxide and breathe out oxygen. We give them carbon dioxide and they give us oxygen!! That's how we breathe!!!!!!!
On average, humans breathe in about 21% oxygen from the air.
Humans breathe out carbon dioxide, the whole world runs in a motion, for example plants breathe carbon dioxide, we breathe in oxygen. Even fish breathe oxygen. They take the oxygen out of the water. So we breathe in what plants breathe out and plants breathe in what we breathe out.
when you breathe in, you breathe in oxygen and when you breathe out, its carbon dioxide
birds breathe oxygen.
We breathe in oxygen, which is in the form of O2 molecules.
We do not breathe in the water as we can't breathe dissolved oxygen.Dissolved oxygen are oxygen that are dissolved into the water.
Oxygen is in the air, and when you breathe in the oxygen gets into your lungs and is absorbed into the red blood cells.
Oxygen. You breathe out CO2
It reduces the oxygen in the area because humans breathe in oxygen and breathe out nitrogen.[plants breathe in nitrogen and breathe out oxygen for humans.so without trees.Humans will not survive