Sentence examples for pollutants decline from inspiring English sources

It also required that total emissions of mercury, sulfur dioxide and other pollutants decline by 10percentt in the same period.

However, increasingly and especially as concentrations of the classical combustion derived pollutants decline it may not be these that are most critical for objects on display.

The positive association between IL-6 and each pollutant declined with moving averages longer than 6 days.

Unfortunately, humans are not so kind to orcas: pollutants and declining fish stocks, especially salmon in the North Pacific, are thought to be causing population declines in several regions.

The portion of rivers and streams "severely impaired" by pollutants had declined to just 1percentt in 1998 from 5percentt in 1993.

Several studies from the last decade linked the trace pollutants to declining sperm counts, infertility and various forms of cancer in humans, as well as genital malformation in wildlife.

Most air pollutants have declined sharply in recent decades, and the amount of forest land hasn't been shrinking at all — it's been fairly stable since 1920 and has actually grown in the last decade.

In the last two decades, emissions of the most common air pollutants have declined by 41percentt, while the Gross National Product (GDP) has increased by 64percentt.

Results also demonstrate heterogeneity in the effects of the different pollutants, with declines in HRV – especially HF – with ozone and formaldehyde exposures, and increases in HRV with PM2.5 exposure.

Although ambient levels of the major criteria pollutants have declined in the United States over the last 30 years, much less is known about exposure to many of the 189 hazardous air pollutants identified in the 1990 Clean Air Act Amendments (Clean Air Act Amendments 1990).

Results revealed an association between traffic-related PM exposures and acute changes in HRV in a middle-aged population when PM exposures were relatively low (14 μg/m) and demonstrate heterogeneity in the effects of different pollutants, with declines in HRV – especially HF – with ozone and formaldehyde exposures, and increases in HRV with PM2.5 exposure.