API PUBL 305-1991

$26.65

Protecting Agricultural Crops from Ozone Exposures Key Issues and Future Research Directions

Published By	Publication Date	Number of Pages
API	1991	156

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Description

The ubiquity and toxicity of ambient air O₃is well documented. Because O₃is an omnipresent air pollutant that affects both human health and vegetation, the U.S. Environmental Protection Agency (EPA) has established both primary and secondary standards. There is no requirement that the primary and secondary standards be identical, nor is there any requirement that only a single expression of the standard be used (i.e., an average concentration for a single time period versus multiple exceedances or integrated exposures). Any effort to propose a secondary standard, whose form is different than the current form of the primary and secondary standard, implies that either (1) the current form is inappropriate for protecting the public welfare or (2) a more restrictive value of the current form of the standard is required.

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