Which of the following is most likely the result of decreasing levels of ozone in the stratosphere?

A decrease in the levels of smog in major cities

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A decrease in the rate of global warming

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An increase in the occurrence of skin cancer in humans

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An increase in photosynthetic activity of phytoplankton

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Solution

The correct option is C An increase in the occurrence of skin cancer in humans
The stratosphere, continues from 10 km to about 50 km. Most atmospheric ozone is concentrated in a layer in the stratosphere, about 15-30 kilometers above the Earth's surface. This ozone layer in the Earth’s stratosphere absorbs most of the Sun’s ultraviolet (UV) radiation that may cause skin cancer. Thus decreasing levels of ozone in the stratosphere may result in an increase in the occurrence of skin cancer in humans.

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