This geography problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.
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The atmosphere is the layer of gases surrounding a planet or other celestial body. Earth's atmosphere is composed primarily of nitrogen (about 78%) and oxygen (about 21%), with smaller amounts of argon, carbon dioxide, and other gases. It protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (the greenhouse effect), and reducing temperature extremes between day and night.