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- <text id=91TT0811>
- <title>
- Apr. 15, 1991: Ozone:Alarming Loss
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1991
- Apr. 15, 1991 Saddam's Latest Victims
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- SCIENCE, Page 55
- Alarming Loss
- </hdr><body>
- <p>Is the ozone layer thinning faster than expected?
- </p>
- <p> Reports about the ozone layer are as maddeningly variable as
- the protective shield itself. Estimates of the problem's
- severity fluctuate virtually with each new set of measurements
- from the atmosphere. Unfortunately, the estimates do seem to
- possess one common thread: they are getting worse. Last week's
- announcement from the Environmental Protection Agency that the
- shield may be disappearing nearly twice as fast in northern
- latitudes as many scientists had predicted is the most alarming
- report to date. The study noted that the loss was occurring both
- farther south, over the most populous regions of the U.S., and
- later in the spring--when more people spend time outside--than had been thought. Worse, the additional thinning of this
- protective layer of gases is expected to increase substantially
- the amount of harmful ultraviolet radiation reaching the earth's
- surface, threatening a vast array of life-forms and boosting the
- number of skin-cancer deaths in the U.S. alone by 210,000 over
- the next 50 years.
- </p>
- <p> The report, which was based on satellite readings
- collected between 1979 and 1990, is thought to present the most
- up-to-date picture of the problem yet. While earlier studies
- using data taken through 1986 had put the loss during the
- previous dec ade at about 2%, the new report says the number for
- the 1980s was closer to 5%. EPA chief William Reilly called the
- results "disturbing" and vowed to push for more stringent
- international controls on chlorofluorocarbons, the man-made
- chemicals thought to be largely responsible for triggering the
- problem. Most developed countries have agreed to ban the
- substances by the year 2000, but even that may not be soon
- enough, said Reilly.
- </p>
- <p> Some scientists and officials feel the EPA may be
- overstating the case. Robert Watson, an ozone expert at NASA,
- commended the study in general but questioned the skin-cancer
- predictions, noting that the ozone layer still seems to be
- intact during the summer months, when most cases of skin cancer
- originate. Some critics also pointed out that Reilly may have
- timed the release of the report to rally public support for the
- environment one week before the National Academy of Sciences is
- scheduled to release a major paper on what the U.S. should be
- doing about global warming. The issue is one on which the White
- House, and chief of staff John Sununu, has been particularly
- intransigent. The science of ozone depletion may be complex, but
- no more so, it seems, than the politics of doing something about
- it.
- </p>
-
- </body></article>
- </text>
-
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