The hole in the ozone layer over Antarctica has reduced to its smallest size in the last five years, according to the National Institute of Water and Atmospheric Research of New Zealand. Scientists estimate that the hole could be permanently closed around the year 2080.
Scientists have calculated that:
– At present the size of the hole is 22 million square kilometers.
– In 2009, it was 24 million km2.
– In 2000, it was 29 million km2.
As for the ozone deficit:
– At presernt, it has been reduced to 27 million tonnes.
– In 2009, it was 35 million tonnes.
– In 2000, it was 43 million tonnes.
With these data, scientists say the hole in the ozone layer is improving year after year and that the international initiatives, such as the 1987 Montreal Protocol, are working.
The ozone layer that protects humans from ultraviolet radiation has decreased, according to scientists, which was created originally by the effect of products as chlorofluorocarbon, used in refrigerators and aerosols prohibited in the Montreal agreement. The hole in the ozone layer is formed each year in Antarctica between August and September, and closes between November and December.