Question

what is ozone hole what is its significance write the harmful effects of ozone depletion

Answer 1

Life on Earth has been protected for thousands of years with a vital layer of poison in the atmosphere. This layer serves as a shield that protects the Earth from harmful ultraviolet radiation from the sun. As far as we know, it is unique to our planet. If it disappeared, ultraviolet sunlight would sterilize the surface of the globe and annihilate the life on Earth.

Significant reduction in ozone concentration and consequent thinning of the ozone layer was evidenced mainly over Antarctica back in 1984. Subsequent studies allowed to observe its dynamics, increasing its size and a similar situation, although less pronounced over the Arctic. To understand better the concept and meaning of ozone hole, we should first understand what exactly the ozone is.

Ozone gas is not stable and is very vulnerable to being destroyed by natural compounds containing:

Nitrogen
Hydrogen
Chlorine


this is your answer...

Answer 2

In the upper reaches of the atmosphere oxygen after combining with O atom forms ozone it can be represented as

O2........(due to uv ray) O+O
O2+O.......O3(ozone)

Unlike oxygen ozone is deadly poisonous but it serves a very important function in the upper reaches of atmosphere.it prevents the harmful ultraviolet rays of sun from entering the earth.

Causes of ozone depletion
...use of CFC and HCFs

Result of ozone depletion...can be clearly seen as the hole over Antarctica
Due to the depletion harmful UV rays enter the earth these rays can cause SKIN CANCER

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