the atmosphere serves as great sun -shade. how?
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The atmosphere serves as great sun -shade as it protects us from harmful ultraviolet rays emitted by the sun.
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It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.
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