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Because we breathe it in. If we couldn't breathe, we'd suffocate and die.

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Related Questions

What factor is the most important to living things?

Oxygen is the most important factor for living things.


Why is oxygen so important to living things?

Oxygen is important because it permits us to live


What is the important element to most living things?

oxygen


What do plants produce that is important to all living things?

Plants produce oxygen during photosynthesis, which is vital for the survival of all living organisms. Oxygen is needed for cellular respiration, a process that releases energy for living organisms to carry out their functions.


What are the common elements found in living things which one is the most important?

oxygen


Two most important gases for living organisms?

oxygen and carbon dioxide are the 2 most important gases for living things


Which of earth's atmospheric gases is most important to living things?

Both oxygen and nitrogen are equally important to living things. Oxygen is necessary for metabolism to continue. But too much oxygen is poisonous. So the presence of nitrogen keeps the oxygen levels low enough to avoid poisoning.


How important are plant to living things?

Plants are essential for living things. Plants produce oxygen through a process called photosynthesis. Without plants, there would not be enough oxygen on the planet for all living things to survive. Plants are also a critical part of the food chain.


Which six elements are the most important to living things?

Carbon, hydrogen, nitrogen, oxygen, phosphorous and sulfur.


What is most important element for respiration?

carbon oxygen hydrogen nitrogen


What is the importance of non living things to living things?

For me the ecosystem is the place were living the living things and non living things and the importance of it to as is that they are produce the oxygen that we are in healing


What gas do all living things need?

The gases of the environment are important to all living things because they help them in various processes. For instance animals need oxygen for respiration while the plants need carbon dioxide for photosynthesis.