Sentence examples for background levels of air from inspiring English sources

By far the greatest contribution arises from non-airport traffic and background levels of air pollution".

Although most women were located in several cities and suburbs east and south of San Francisco and east of Los Angeles, a few were located near the coast, where background levels of air pollution are generally lower.

Since different studies use different measures of traffic exposure, complicating comparisons, we also provide a table with background levels of air pollution in the region, to give a picture of the exposure situation in the area (Additional file 1).

In contrast, our estimate was slightly smaller than that obtained in a cohort study among the Dutch general population (HR = 1.41; 95% CI, 0.94 2.12), where background levels of air pollution were taken into account (Hoek et al. 2002).

Several studies have estimated exposure-response functions for the relationship between urban background levels of air pollution and physical health outcomes, both for short- and long term exposure [ 29- 31].

Although this procedure may adequately reflect average exposure of pregnant women to background levels of air pollution in their neighborhood, it does not take into account differences in exposure within neighborhoods because of proximity to heavy-traffic roadways and freeways.

Most studies, however, have been conducted in areas with high background levels of ambient air pollution, making it challenging to isolate an independent effect of traffic.

We evaluated apartment perc levels qualitatively against background levels of perc and against the NYSDOH residential air guideline of 100 μg/m.

Lee Mauldin, a researcher in the University of Colorado Boulder's Department of Atmospheric and Oceanic Sciences, found both in the air above Finland's boreal forest, where background levels of sulfuric acid (H2SO4) led to the discovery of a new atmospheric oxidant.

If a 10-fold increase in air chlorpyrifos does not cause a detectable increase in urinary TCP, then the 1-fold background air cannot be contributing measurably to the children's background levels of urinary TCP.

For example, at one airport where many airplanes used avgas, average and maximum air lead levels were 0.030 and 0.302 μg/m, respectively, versus background levels of 0.007 and 0.018 μg/m (Environment Canada 2000).