The Ozone Layer

Solar radiation that reaches the Earth's surface, 45% is the visible spectrum (visible light), 45% to 10% infrared radiation and the ultraviolet radiation.
The ozone (O3) is found especially in the upper layers of the atmosphere (stratosphere) to 15 km from the surface and form a shield. This thin layer is the only protection of the earth to filter the ultraviolet rays of the sun, thus allowing the existence of life on Earth.

The constant destruction of the ozone layer leads to an increase in ultraviolet rays (UV), high energy. These rays to reach the Earth will promote the destruction of proteins and DNA, leading to skin cancer, cataracts, changes in the immune system, damage to crops, in fish and plankton that feed.

In several areas, the shield of ozone is getting thinner, allowing the intensification of anything healthy ultraviolet rays and new holes may arise from any populated regions on latitude. The higher the fraction of ultraviolet rays to reach Earth the effects are more serious and smaller populations of fish and crops.