Here, ground-level or "bad" ozone is an air pollutant that is harmful to breathe and it damages crops, trees and other vegetation. ... The stratosphere or "good" ozone layer extends upward from about 6 to 30 miles and protects life on Earth from the sun's harmful ultraviolet (UV) rays.
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The present greatest problem for Eastern Europe is water quality.
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Camels were used as domestic animals because Camels have long been domesticated and, as livestock, they provide food (milk and meat) and textiles (fiber and felt from hair).
