Scientist found development in a hole of atmosphere's protective ozone layer, they found signs of heling, as researchers reported on June 30.
More than 30 years since they spotted a hole in the atmosphere's protective ozone layer. Measurements of the ozone hole taken in September revealed the breach has shrunk by more than 1.5 million square miles (4 million square kilometers) - about half the area of the contiguous United States - since 2000.
Researchers attributed the ozone's recovery to the continuing decline of atmospheric chlorine originiting from chlorofluorocarbons (CFCs). These chemical compounds, once commonly used in aerosols, dry cleaning and refrigerators, were banned when nations around the world signed the Montreal Protocol in 1987 in an effort to repair the ozone hole.
"We can now be confident that the things we've done have put the planet on a path to heal," lead author Susan Solomon, an atmospheric chemist at the Massachusetts Institute of technology (MIT), said in a statement.
This is the first time evidence has been uncovered since the scientists have long suspected the ozone layer was slowly healing.
Researchers attributed the ozone's recovery to the continuing decline of atmospheric chlorine originiting from chlorofluorocarbons (CFCs). These chemical compounds, once commonly used in aerosols, dry cleaning and refrigerators, were banned when nations around the world signed the Montreal Protocol in 1987 in an effort to repair the ozone hole.
"We can now be confident that the things we've done have put the planet on a path to heal," lead author Susan Solomon, an atmospheric chemist at the Massachusetts Institute of technology (MIT), said in a statement.
This is the first time evidence has been uncovered since the scientists have long suspected the ozone layer was slowly healing.
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