oxygen
Our body needs oxygen gas to make energy and survive.
gas. Mars has only a thin atmosphere. What you would find on the surface is rocks.
Humans can Not survive on Saturn. The giant gas planet has a gravitational pull that would crush a human being in seconds. It is not possible for a human being to survive on Saturn for more than mere seconds.
Cows can't survive on gas alone. Neither can humans. Both cows and humans need food and water to survive, not just oxygen (which is a gas we breathe).
oxygen
Fish need oxygen to live.
human beings need nitrogen for building proteins and o2
Mars is a terrestrial planet, not a gas giant. Mars is a terrestrial planet because the majority of it is rock, not gas.
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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.
Living on Mars would require a spacesuit for protection from the harsh environment, a habitat to provide shelter and life support systems for oxygen, water, and food production. Additionally, energy sources such as solar panels or nuclear power would be essential for powering equipment and maintaining a habitable environment on the planet.
That would be oxygen