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5. Our Environment
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Q33 of 163 Page 241

What would happen if the ozone layer in the atmosphere completely disappears?

If the ozone layer in the stratosphere disappears completely then ultraviolet radiations from the sun would easily reach the earth’s surface and damage skin cells in humans with radiations thus causing cancer. It will also lead to diseases in animals and damages in plants.


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31

What is sewage? How is sewage disposed of?

32

Write the harmful effects of ozone depletion.

34

With the help of a flow diagram, describe how energy from the sun flows through various trophic levels.

34

Explain why, the flow of energy in the ecosystem is said to be unidirectional.

Questions · 163
5. Our Environment
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