Sentence examples for pollutants change from inspiring English sources

However, as fuel use and chemical composition of air pollutants change, the contribution of outdoor pollution as a cause of cancer may also change.

Jesse Kroll examines how pollutants change chemically as they waft around the globe.

Not only do average levels of individual pollutants change from season to season, but correlations between pairs of pollutants can also vary by season.

Geocoding and time-activity error are likely important in assessing health effects of exposure to near highway pollutants because these pollutants change rapidly in both space and time and people are moving in and out of the near highway environment.

Two pollutant models were also fit to evaluate how positive associations, noted for some pollutants, changed after adjusting for daily levels of other pollutants.

The number of air monitors measuring a specific pollutant changed through the study years as monitors went on and off line.

If a population or species doesn't happen to have the right kinds of genetic variation, it will not evolve in response to the environmental changes wrought by humans, whether those changes are caused by pollutants, climate change, habitat encroachment, or other factors.

Other challenges include: global problems, such as long-range transport of pollutants, climate change; real-world-exposures (including indoor air pollution); improvements in technologies to remove difficult-to-treat pollutants; and addressing the growing number of mobile sources.

This confirmed that for pollutants that change with season and are averaged over short time intervals (pregnancy months or trimesters), behavioral factors that do not change seasonally are unlikely to be confounders.

HOUSTON — Environmentalists squared off against business groups and Texas state officials on Thursday at a hearing on the Obama administration's proposal to tighten standards for smog-producing pollutants, a change that could improve the health of millions but would impose burdensome costs on industry and local governments.

Elsewhere, habitat loss is a significant cause of frog population decline, as are pollutants, climate change, increased UVB radiation, and the introduction of non-native predators and competitors.