Question

Will the efficiency of human body increase if the oxygen is doubled in atmosphere?​

Answer 1

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More oxygen would get into your body, improving your circulation and increasing your energy. Humanity would see much less disease, and you'd call in sick a lot less. A type of infection fighting immune cell known as neutroph would occur more often, keeping you healthier.

Answer 2

Answer:

No

Explanation:

Due to a sudden increase in Oxygen, a condition referred to as Oxygen Toxicity may arise in our respiratory system, due to which our alveoli might collapse and stop functioning due to the excessive amount of oxygen being breathed in, and in the long term may lead to lung disease, and in extreme cases, even death.

However, if the Oxygen was doubled from the the beginning of humanity, then we would have slowly evolved to adapt to the atmospheric conditions.

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