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By Ordoh Staff. Published on Mar 9, 2014. 0
Scientists have warned four new man-made gases are damaging the ozone layer of our planet even though production of all similar gases are banned under a 1987 treaty.
Experts have traced the new gases may have been coming from industrial sources, and probably from those which are making refrigerants or pesticides. The ice of Greenland and air samples in Tasmania contains some amount of the new gases.
Ozone layer shields the Earth from UV rays that causes eye cataracts and skin cancer. However, under the 1987 Montreal Protocol of UN the phase-out of damaging chemicals have helped in recovering it.
Johannes Laube from University of East Anglia in England was the lead author of the study. He said as of now the concentrations are not a threat.
Scientists say not any of the four gases was present in the ice of Greenland before 1960s and now it is found more than 74,000 metric tons of all had been released in the atmosphere.
The study is published in the Nature Geoscience journal.
A team of scientists in Australia, France, Switzerland, Netherlands, Germany and Britain said the exposure of the new gases in the atmosphere is just a small fraction compared to the million metric tons of CFCs (chlorofluorocarbon) produced a year at the peak in 1980s
Expert say it is not yet known whether the new emissions were illegal as the Montreal Protocol has exemptions. However, it is time to tighten such loopholes.
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