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Carbon, Hydrogen, Oxygen and Nitrogen.

These four elements form four vital compounds for the maintainance of life. They are , Methane(CH4), Carbon dioxide (CO2), Water(H2O), and Ammonia(NH3)

These four compounds form into very complex arrangements to give molecules, proteins, carbonhydrates etc, needed for life.

Many other elements also come into 'play', notably phosphorus, potassium , sulphur, iron , magnesium, chlorine, etc.,

However, the above four elements are the critical ones.

NB The Bio-sphere of the Earth, there are Carbon cycles, Oxygen cycles, and Nitrogen Cycles.

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lenpollock

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5mo ago

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