The holes in the protective ozone layer of the Earth has begun to shrink 30 years since the ban of damaging aerosol sprays and coolants, scientists found in a new United Nations report.
American news agency AP reported on Monday, November 5, that according to a scientific assessment released this week in Ecuador, as a result of phasing out ozone-depleting chemicals, since 2000, the upper layer of ozone has increased by about 1 to 3 percent per decade.
The upper ozone layer high over the Northern Hemisphere should be completely in shape in the 2030s and the gaping Antarctic ozone hole should disappear in the 2060s.
High in the atmosphere, ozone protects Earth from ultraviolet rays that cause skin cancer, crop damage and other problems, but it is depleted by man-made chemicals called chlorofluorocarbons (CFCs), which release chlorine and bromine. Countries agreed to ban them in the Montreal Protocol in 1987.