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Water is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth. Apart from drinking it to survive, people have many other uses for water.
Food is needed by the human body for energy, to repair and build cells and to prevent sickness and heal from it. While it is possible to obtain nutrients in a scientifically controlled manner, common food is the most efficient way of obtaining energy and nutrients.
Energy is life and the production of energy in the body depends upon oxygen. The second important function of oxygen is to combine with metabolic waste products to allow their elimination from the body. This process is called the oxidation reduction cycle.
Carbon dioxide (CO2) is a gas that's always present in your blood. It is the waste product generated as your body uses up oxygen, and it is expelled from the lungs when you exhale. At normal levels, its presence has no measurable adverse effects on you, but if your breathing is compromised or you are exposed to large amounts of this gas, you can experience a wide range of side effects, some of which include permanent injury and death.
All The Essential Resources To Build A Colony On Mars
By Wen Lock
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