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63 THE AIR

Ozone is found in the atmosphereOzone is a gas. There are three oxygen atomsin a

molecule of ozone.

The molecular formula is O3.

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63 THE AIR

Ozone is found in the atmosphereOzone is formed from oxygen, when sunlight interacts

with nitrogen oxides from vehicle fumes.

This ozone may be in the form of smog.High levels of ozone near the ground is not good for

us.

Between 20 !0"m from the ground there is an areawhere high concentration of ozoneoccurs

naturally.

#t is called the ozone layer.

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63 THE AIR

Ultraviolet light damages cells$ltraviolet radiation from the %un can damage DNA

inside living cells.

The ultraviolet radiation causes the s"in to &roduceextra melanin.

'elanin is a dar" &igment. #t absorbs UV lightbefore

it can &enetrate the cells dee& in your s"in.#t is a defence mechanismused by the s"in to sto&

damage to your ()*.

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63 THE AIR

Ultraviolet light damages cells+hen