Chlorine in the stratosphere is believed to come primarily from CFCs rather than from natural sources such as volcanoes because?
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ozone. ... ozone alert a warningissued by health and environmental officials during periods of excessive ozone pollution for those individuals most sensitive to ozone, such as the very young, the elderly, and ill individuals, especially those with respiratory conditions.
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The desert cooler is usually fitted outside a window and takes in the air from outside. The fan in this unit is used as an exhaust. ... The room cooler on the other hand is less powerful than a desert cooler. This cooler is kept inside the room and is placed on a trolley that can be moved around.
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