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Which layer protects earth from harmful rays of the Sun?

  • A.Ionosphere
  • B.Ozone layer
  • C.Troposphere
  • D.Magnetosphere

Answer: B

The ozone layer, in the stratosphere between about 15 and 35 km, shields the earth from the sun's harmful ultraviolet radiation.

Ozone absorbs almost all UV-C and most UV-B, which would otherwise cause skin cancer, cataracts and damage to crops and plankton. Absorbing that energy is also what warms the stratosphere.

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