Sentences with phrase «ppb ozone standard»
Starting in 2010, EPA experienced a series of delays in issuing a proposal to tighten the 75 - ppb ozone standard, which was set during George W. Bush's presidency.
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ven so, during 2010 - 2014 people in parts of California, Arizona, Colorado, Texas, the Midwest and the Middle Atlantic still experienced more than 15 days a year in which ozone levels exceeded the U.S. health - based air quality standard of 70 parts per billion (ppb) averaged over eight hours.
Average number of days per year (2010 - 2014 average) when ozone levels exceed the US health - based air quality standard of 70 parts per billion (ppb) averaged over eight hours, at non-urban and urban sites.
A quick estimate suggests that a 10 ppb reduction in the ozone standard would translate into an annual cost saving of approximately $ 1.1 billion in labor expenditure.
For example, in the Cincinnati - Dayton region, assuming an ozone standard of 70 ppb, production would decline by $ 14.8 billion, killing 91,700 jobs in 2030.
Now, they are coming for oil and gas development and manufacturing through the just - announced 626 - page ozone regulations, which will require states to dramatically reduce ozone emissions from the current 75 parts per billion (ppb) to a range of 65 to 70 ppb — though environmental groups want a 60 ppb standard, which may be the final rule.
In 2015, the EPA set the standard for ground - level ozone, one of the most common criteria pollutants, at 70 parts per billion (ppb), a standard at the lenient - end of the range recommended by EPA's scientific advisory committee.
In 2015, the EPA set the standard for ground - level ozone, one of the most common criteria pollutants, at 70 parts per billion (ppb), a standard at the lenient - end of the range
A group of leading scientists appointed to advise the EPA had actually recommended stricter health standards for ozone levels - from 60 to 70 ppb.
Since a large body of evidence links pollution with poor health, and health is an important part of human capital, efforts to reduce pollution could plausibly be viewed as an investment in human capital and thus a tool for promoting economic growth... We find robust evidence that ozone levels well below federal air quality standards have a significant impact on productivity: a 10 ppb decrease in ozone concentrations increases worker productivity by 4.2 percent.