Saturday, July 24, 2010
OZONE Hole [29-2]
A second permanent ozone hole was detected in the area of the North Pole in 1990, producing radical meteorological changes in parts of the Northern Hemisphere. In 1996, the World Meteorological Organization (UNO) measured the Southern Ozone Hole to be the size of the US and Canada combined. They are expected to increase in size until 2020.