The scientist finds the largest ozone cavity up until now

The scientist finds the largest ozone cavity up until now
The scientists of NASA say recently, they found a largest ozone cavity up until now above the Antarctic, the area is up to more than 29,140,000 sq. km., it will continue expanding within the next 10-20 year. The scientists of NASA say, shows through the data that are observed continuously from August of this year to October, it is equivalent to the cavity of U.S.A.'s territorial area triple that one exists above the Antarctic, people can already see with the naked eye, ozone that have protective action on the earth above the Antarctic is reducing too. As for the reason, a scientist among them says, this is mainly because chlorine and some other artificial waste gas enter atmosphere, have destroyed the ozone layer in the high altitude. According to a ten - year long plan, American National Aeronautics and Space Administration will continue observing the South Pole of the earth and North pole.

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