At sea level, the air is about 23% oxygen. At the top of Mt. Everest, the air

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At sea level, the air is about 23% oxygen. At the top of Mt. Everest, the air is still about 23% oxygen. So, why do almost all mountain climbers need to bring extra bottled oxygen to survive?

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Conceptual Integrated Science

ISBN: 9780321818508

2nd Edition

Authors: Paul G Hewitt, Suzanne A Lyons

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