The Ozone Hole.

All of us are familiar with the disease named cancer. when the cells of the body begins to grow haphazardly it causes tumors or lumps on our skin. many people die due to cancer. the number of deaths in developing countries due to cancer is much more than in developed countries. last week i had attended a seminar on cancer awareness. i learnt some interesting facts about skin cancer. it is caused by exposure to the ultraviolet rays of the sun. but, if these rays are harmful for us then surely something must obviously be protecting us or else all of us would have contracted skin cancer by now. but, we have not contracted skin cancer only because of the ozone layer surrounding the earth. scientifically ozone is known to have three atoms of oxygen that is O3.

The ozone layer protects us from the radiation of the ultraviolet rays of the sun.but, recently i heard about the term ozone hole.

ozone hole is caused because of the gadgets that we use, like refrigerators,television,aerosol sprays,computers,etc. that is because they use Chlorofluorocarbons or CFC's. these Chlorofluorocarbon gases float upwards towards the stratosphere and causes the thinning of the ozone layer. it breaks it up into two atoms+one atom of oxygen i.e O2+O. this thinning or hole in the stratosphere is harmful for us as it exposes us to the ultraviolet rays of the sun.

But Chlorofluorocarbon use is not decreasing. it is increasing along with the increasing population. in the process it is enlarging the hole in the ozone layer.

Some steps were taken by many countries . the Kyoto Protocol is one such step it aims to reduce emissions of Greenhouse Gases.