Although it would be impossible to extrapolate from data gathered in a centimeter of flowing fresh water, marine biologists studying the seasonal Antarctic ozone hole are excited about Bothwell's research.
22.
In the U . S ., chlorofluorocarbons continued to be used in other applications, such as refrigeration and industrial cleaning, until after the discovery of the Antarctic ozone hole in 1985.
23.
Increased solar ultraviolet radiation resulting from the Antarctic ozone hole has reduced marine primary productivity ( phytoplankton ) by as much as 15 % and has started damaging the DNA of some fish.
24.
In 2001 the Antarctic ozone hole reached a maximum size of more than 10.2 million square miles, ( 26.5 million kilometers ) larger than the entire area of North America, including the United States, Canada and Mexico combined.
25.
Several momentous environmental disasters or discoveries-- Love Canal in 1978, Three Mile Island in'79, Bhopal in'84, the Antarctic ozone hole in'85, Chernobyl in'86 and the Exxon Valdez in'89-- inspired media coverage and helped bring environmentalism into the mainstream.
26.
Based on data collected by Britain's Halley Station in Antarctica, Shanklin and his colleagues calculated that at the present rate of destruction of the ozone layer, the seasonal Antarctic ozone hole will be fully depleted by the year 2005.
27.
It was named after Robert L . deZafra, Professor of Physics at the State University of New York, Stony Brook, whose research at the South Pole and McMurdo Sound provided breakthrough contributions to understanding the formation of the Antarctic ozone hole.
28.
In 2001 the Antarctic ozone hole reached a maximum size of more than 10 . 2 million square miles, ( 26 . 5 million kilometers ) larger than the entire area of North America, including the United States, Canada and Mexico combined.
29.
Has led to an 81 percent decline in the production during the 1990s, and marked a slowing in the growth of the Antarctic ozone hole . _ The World Health Organization's Global Polio Eradication Initiative has reduced polio cases globally from 350, 000 in 1988 to 480 in 2001.
30.
With winter drawing to a close in the Southern Hemisphere, the shuttle crew-- working with ground-based teams of researchers from Germany, France and Belgium as well as the United States-- will attempt to identify chemical reactions, solar energy levels and other factors at work as a record-tying Antarctic ozone hole mends.
