Sentences with phrase «outdoor air concentrations»
However, the agency is less concerned about outdoor air concentrations than it is about the risks to water - dwelling creatures, an EPA spokesperson said in an email.
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«And we've shown that there are a number of times where the nitrogen dioxide (NO2) concentrations exceed the EU hourly mean limits for outdoor air quality.»
By adjusting elements of the test, such as the air exchange rate, which is the number of times per hour indoor air is replaced by outdoor air, as well as the concentrations of terpene and ozone in the chamber, the group was able to ascertain how those variables each affected the formation of secondary organic aerosols.
To monitor urban air quality, environmental agencies typically measure pollutant concentrations in samples collected at centralized outdoor locations and extrapolate individuals» average exposures from those measurements.
Havet explained the key findings: «For the first time in adults, we found associations between long - term exposures to outdoor air pollution, exhaled 8 - iso concentration and current asthma.
The Environmental Protection Agency has found indoor air can be filled with more pollutants than outdoor air, which can ultimately lead to symptoms of «sick building syndrome»: tiredness, fogginess, and lack of concentration.
The EPA has stated that indoor air quality is 3 times more polluted than outdoor air quality and a 2000 study found that there is an increase in lead concentrations in our indoor air (Sobel et al., 2000b).
Outdoor air pollution targets to reduce concentrations of particulate matter (PM 2.5), globally averaged, return less than $ 1 for every dollar spent.
Your risk depends on the concentration of VOCs you're breathing in, but the level of VOCs indoors can be up to five times higher than those outdoors, and with the number of products and materials that produce VOCs — paint, caulk, varnish, air fresheners, cosmetics, cleaning supplies, and more — whatever you can do to lower your chance at inhalation helps.