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Trends and Present Status of Air Qu
Trends and Present Status of Air Quality
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
0/5000
Trends and Present Status of Air Quality
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
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Trends and Present Status of Air Quality
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
aIn view of increasing incidence of asthma and other respiratory diseases in American cities these values were introduced as revision to the Clean Air Act by EPA in July 1997. However, they were stroked down by the U.S. Court of Appeals for the District of Columbia on May 14 1999 on the ground that EPA had failed to explain how it reached the quantitative values of the standards. In 2001 the United States Supreme Court reversed the decision of the Court of Appeal and sent the standards for ozone and SPM back to the lower court for further consideration. b98% of daily averages must be below these values; no more than 7 days per year may exceed this value.
Source: EPA communication and Global Monitoring System, Assessment of Urban Air Quality.
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