Ima

Ozone is a gas . There is a layer of ozone high up in the atmosphere. The Ozone layer is about 25 kilometres above the ground.

Keywords:

Radiation - Known as UV - Full form of UV is Ultra Violet rays entering from the Sun.

. Too much UV rays can cause skin cancer.

. Can even harm the single cell organisms like plants and aquatic animals.

. Between the Earth and Sun, there is an invisible pale blue protective shield called Ozone layer.

Keyword:

Atmosphere

Oxygen molecules contain 2 atoms.

. Ozone layer is about 3-5 millimetres in thickness. Short form of millimetres - mm

. It protects us from UV rays

. There was a hole in the Ozone layer.

. In 1970 scientists discovered that certain man made chemicals were responsible for the hole.

Keywords:

Chlorofluorocarbon - Short form - CFCs

Nitrogen

Nitrogen - Coming out from a wide range of industrial and consumer appliances.

Examples :

. Refrigerator

. Air Conditioner

. Fire Extinguisher

Blowed towards the ozone layer