They warned that more ultraviolet radiation will also deeply impact air quality, and human and ecosystem health on earth.

However, the distribution of the ozone layer will help the Northern Hemisphere of the earth.

The model showed a nine percent decrease in ultraviolet radiation hitting Northern Hemisphere's high latitudes.

Reported increase in the ground-level ozone on Europe's mountains and the west coasts of North America and Europe indicates that the deadly changes predicted by the two researchers may have already begun.

Interestingly, ozone is created in the earth's outer atmosphere by ultraviolet rays themselves. On entering the stratosphere, these ultraviolet rays hit oxygen molecules, breaking them into two atoms.

But being unstable, each of these two atoms clings back to the oxygen molecule, thus creating ozone molecules.

Greenhouse gases (nitrous oxide and hydroxyl) and chlorofluorocarbons (generated by air-conditioners and refrigerators), which are capable of rising into the stratosphere, have been blamed for the depletion of the ozone layer.