A Friend Tells You There Is No Reason to Worry

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The Answer is Ozone is found in both the stratosphere (10-45 km above earth's surface) and the troposphere (atmosphere closest to Earth). Ozone in the stratosphere, which occurs as a result of oxygen reacting with ultraviolet radiation, prevents much of the damaging solar UV radiation from penetrating to the Earth's surface. Unfortunately, ozone in the stratosphere is threatened by man's use of chemicals like CFCs, which break down the ozone into oxygen. Ozone in the troposphere is a human-made secondary pollutant. Ozone in the troposphere causes health problems and stresses plants. Ozone in the troposphere does not ever find its way to the stratosphere to fix the declining composition there. Thus, reducing ozone in the stratosphere and increasing ozone in the troposphere are both air quality concerns, though for different reasons.

A Friend Tells You There Is No Reason to Worry

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A Friend Tells You There Is No Reason to Worry

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