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| ? References in periodicals archive |
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More than 100 million Americans live in areas that exceed the
EPA's National Ambient Air Quality Standard (NAAQS) for ozone of 80
parts per billion (ppb) ozone averaged over a peak 8-hour time period.
"EPA's National Ambient Air Quality Standard is a
'property-line' standard," explains Tamara Thies,
director of environmental issues for the National Cattlemen's Beef
Association. , EPA based its National Ambient Air Quality Standard (NAAQS) for
ozone primarily on two criteria: symptoms in exposed people, such as
difficulty breathing, and how much air exposed people can exhale in 1
second. |
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