Sentence examples for high level of background pollution from inspiring English sources

It has been suggested that the expected number of people developing asthma and asthmatic symptoms due to traffic exposure may have been underestimated in studies of highly trafficked areas due to a high level of background pollution.

However, because of relatively high levels of background pollution in our study area and possible misclassification of exposure, we cannot completely rule out an adverse effect, and further study is needed which incorporate life-time exposure to pollution in populations with wide variation in exposure.

Consequently, in the all-off background state, a relatively high level of background mRNA remains.

Three of these samples were selected for the analysis of sewage and to determine the level of background pollution in the ancient city.

Contributions from high levels of background : Rural LPG using households for e.g. may benefit from low indoor emissions but are still at risk from infiltration of outdoor air pollution originating from solid cookfuel use in the community/village.

Vehicle emissions, coal-fueled factories and construction sites in and around Beijing generate the high level of air pollution.

The latter is characterized by a high level of air pollution due to frequent thermal inversion, with pollution being trapped close to the ground level.

Previous studies have shown that the number of nah gene at high level of pollution is consistently greater than that at low level of pollution [37], [41].

The high concentration of EC implies the high level of pollution of the Loktak Lake.

Today, world is witnessing very high level of pollution by xenobiotic compounds.

Britain was on smog alert earlier this month after recording very high levels of air pollution.