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Profpat · **ozone layer -** 11-04-2007, 05:58 PM

Profpat walks into a bar.
Profpat reads the following article;
NASA: Ozone Hole Returns to Average Size

By SETH BORENSTEIN – Oct 19, 2007
WASHINGTON (AP) — The Antarctic ozone hole is back to an average size, shrinking about 16 percent from last year's record high, NASA said Friday. But it's still the size of North America.
The ozone hole in mid-September reached a maximum size of 9.7 million square miles, down from its peak of 11.5 million square miles last year, said NASA atmospheric scientist Paul Newman.
Human produced gases, containing chlorine and bromine, damage the Earth's protective ozone layer, forming a hole over the South Pole and into the Southern hemisphere. Because the ozone layer protects life on Earth by blocking ultraviolet rays, countries across the world 20 years ago agreed to ban many compounds such as spray-can propellants.
The ozone hole was first discovered in 1985, is not natural, and at the current rate should be closed up by 2070, Newman said. Nearly 80 percent of the ozone-depleting chemicals in the atmosphere are man-made

Great news says Profpat.

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Profpat Grandmaster Status: Online Posts: 3,176 Thanks Given: 320 Thanked 531x in 485 Posts Join Date: May 2007 Rep Power: 46	ozone layer - 11-04-2007, 05:58 PM Profpat walks into a bar. Profpat reads the following article; NASA: Ozone Hole Returns to Average Size By SETH BORENSTEIN – Oct 19, 2007 WASHINGTON (AP) — The Antarctic ozone hole is back to an average size, shrinking about 16 percent from last year's record high, NASA said Friday. But it's still the size of North America. The ozone hole in mid-September reached a maximum size of 9.7 million square miles, down from its peak of 11.5 million square miles last year, said NASA atmospheric scientist Paul Newman. Human produced gases, containing chlorine and bromine, damage the Earth's protective ozone layer, forming a hole over the South Pole and into the Southern hemisphere. Because the ozone layer protects life on Earth by blocking ultraviolet rays, countries across the world 20 years ago agreed to ban many compounds such as spray-can propellants. The ozone hole was first discovered in 1985, is not natural, and at the current rate should be closed up by 2070, Newman said. Nearly 80 percent of the ozone-depleting chemicals in the atmosphere are man-made Great news says Profpat.