The ozone layer works as a type of filter on Earth, protecting the planet from solar radiations that may increase skin diseases, and eye impairments, such as cataract.
From 1995 to 2005, Brazil managed to cut down its emissions by 9.928 tons of Potential Ozone Destructor, a measure adopted to check the level of damage the gases cause to the layer. Among 172 countries, Brazil was the fifth with the greatest overall reduction. The country that most reduced its emissions was China. However, in 2005 the Chinese emitted over 10 thousand tons, well above United States and Brazil, where overall reduction is close to zero.
Brazil is one of the 191 countries to have signed the Montreal Protocol, created in 1987, which plans the reduction of production and use of CFCs, used in cooling systems and in the production of aerosols and plastics.