Consequence of Ozone Depletion:

The ozone layer protects Earth's living beings from harmful ultraviolet rays (UVs). For every 1% decrease of stratospheric ozone, an additional 2% of UV rays reach Earth's surface. These rays can have bad consequences on humans health causing skin cancer and suppression of the immune response system. It is frequent nowadays, that short term exposure to sunlight causes sunburn. Some countries now are using a scale from 0 to 15, called the UV index, that indicates how safe it is to be exposed to sunlight. The following table shows how the variation of the UV index can affect human skin:

     UV rays can cause harm to natural ecosystems too. A typical problem due to high levels of UV-B radiation is the damage of the plankton. Plankton is the principle food of krill and small fish squid which in turn are the principle food of large fish, penguins, seals, wheals, etc.