Every year on September 16 is celebrated the International Day for the Preservation of the Ozone Layer , in remembrance of September 16, 1987 , when representatives of 24 countries signed the Montreal Protocol (resolution 49/114), pledging to reduce those chemicals that destroy ozone layer.
Today , the countries that have signed the treaty are 198.
The ozone layer acts like a giant umbrella above Earth and protects humans from harmful effects of ultraviolet radiation of the sun, which cause sunburns , skin cancer and cataracts . When the ozone layer weakens as the so-called ” ozone hole ” over Antarctica , ultraviolet rays reach the Earth’s surface , threatening humans and the environment – the animals and plants. 1% reduction of the ozone layer leads to a 2% increase in skin cancers and cataracts .
The relevant UN agencies highlights the progress made by the international community to reduce the chemicals that deplete the ozone layer , especially chlorofluorocarbons , who in 1950 conquered the market propellants , blowing agents for various plastics, in systems refrigeration and air conditioning (Freon) as solvents.
The last 20 years have been allocated through UN programs , close to $ 2 billion in 130 developing countries to fulfill their obligations under the Montreal Protocol . The result is that the reduction of harmful chlorofluorocarbons exceed 2,000,000 tons over the years.