Ozone: the pollution paradox.

New York State Conservationist | June 1, 1997| | Copyright

Near the ground, ozone is an air pollutant from man-made emissions. Ten to 30 miles overhead, it forms a protective layer that filters dangerous ultraviolet radiation from sunlight. Unlike its more common cousin oxygen (O[sub.2]), ozone (O[sub.3]) is a highly reactive gas of three oxygen atoms that occurs in only small amounts in our atmosphere.

The earth's atmosphere is a vast chemical factory that continuously forms and destroys substances, including ozone. When everything is working properly, there is a natural balance that maintains a stratospheric ozone layer ...

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