Consequences of the excessive ultraviolet radiation

Our planet has been receiving excessive ultraviolet radiation through the Ozone Hole.

The Ozone Hole was created by the emission of the CFC gas (from old refrigerators, aerossol sprays and old air conditioning devices) into the Ozone Layer.

The consequenses excessive exposure to the UV-B rays in the Nature are:

-damaging terrestrial plant life;

-aquatic ecosystems;

-defreezes ice caps;

The consequences in humans are:

-increasing risk of skin cancer;

-cataracts;

-suppressed immune system.

The factors that influence the risks of the consequences in humans are explained by this graphic:

As seen in the graphic the most  "risk taking" individuals are outdoor workers and sun-seeking cultures. The regions with the most UV-B radiation levels are snow covered areas, the high altitude places, cloud covered zones, and regions closer to the ozone hole like Australia and Southern Argentina and also regions closer to the Equator such as Central Africa and Northern South America.

Humans still have means to protect themselfs from the ultraviolat rays but Nature cannot protect itself from those. The Ozone Layer was "the Nature's sunscreen" with the purpose of protecting all the planet from that kind of radiation. Around the year of 1990 developed countries have stopped using CFC's but developing countries still use it. Now it is up to quemists to discover a new quemical which is more economical and also less pollutant than the CFC gas.