Yes they very well do.
Humans need oxygen to survive. Oxygen is necessary for cellular respiration, which allows our cells to produce energy. Without a steady supply of oxygen, our organs and tissues would not function properly.
Green houses for oxygen and have a heater that doesn't need a plug
Because our bodies need to be able to get rid of Carbon Dioxide, and intake fresh Oxygen.
we celebrate VAN MAHOTSAV on July 4th because we need to spread the word to people telling them not to cut down trees because more and more trees are being cut down but what people don't understand is there are houses and other buildings being put up in place of the trees but if we don't have trees we don't have oxygen and if we don't have oxygen then people cant breathe in the new houses or buildings so basically they are killing people by taking oxygen to put up houses that they don't even need to be built
oxygen
Mars is no place for a human being. There is no breathable oxygen and no water, which are both things that humans need to survive.
Because we need the oxygen that the trees and plants produce via photosynthesis. we must save our forest We would survive without trees because The atmosphere creates air. The forest is the houses of more animals. They are enjoying in the forest as theirs houses
No, both the box and the human being will need to be monitored strictly. Pressure changes in the box need to be monitored more precisely as the oxygen, carbon dioxide, water vapor, temperature etc.
oxygen if everywhere. In the heart, lungs, blood. YOu need blood everywhere to live!
If all the oxygen was converted into ozone, there will be no breathing gas. We need oxygen to support human life.
Oxygen is used to help people breathe in and out
Oxygen is important because our cells need oxygen to survive. If they don't get oxygen then the cells will die the the human itself will die.