The Key Role of Ozone in the Earth’s Atmosphere (511 words, 1 pages)
Ozone The Earth's atmosphere is divided into many layers. The lowest region, the troposphere, extends from the Earth's surface up to about 10 kilometers in altitude. Virtually all human activities occur in the troposphere. Mt. Everest, the tallest mountain on the planet, is only about 9 km high. The next ...
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