Ozone gas has been known to be highly reactive, it depends of where it is located, which can be either beneficial or harmful to human health.
ultraviolet radiation
Ozone Depletion Over Arctic At Unprecedented Level Observed
Depletion of the ozone layer, the shield that protects life on Earth from harmful levels of ultraviolet rays, has reached an unprecedented level over the Arctic this spring because of the continuing presence of ozone depleting substances in the atmosphere and a very cold winter in the stratosphere,according to the World Meteorological Organisation (WMO).
Ultraviolet Radiation Exposure From Sun, Left Whales Sunburned
Like humans, the light skinned whales seemed to have the most difficulty dealing with the sun. Blue whales had more severe skin damage than their darker skinned counterparts, fin whales and sperm whales, even though the latter spend so much time at the surface.