Third, population-level exposures using average concentrations from a limited number of air pollution monitors as a proxy for each individual may be subject to some measurement errors, and consequently we cannot determine whether the increased pollution-related mortality risk in high SDI areas is due mainly to greater pollutant exposure or increased biologic susceptibility.
Van der Sluijs said it was highly likely the insecticide was causing the invertebrate die-offs, because imidacloprid was already known to be acutely toxic to these species and is by far the greatest pollutant in the waters.
Stormwater data collected with grab samples has much greater pollutant concentration variability than in potable water or wastewater monitoring programs.
The results indicate that the greatest pollutant source is transport, especially in the issuance of street network design, followed by gas and electricity consumption.
In this study, we observed increased odds of several CHDs with greater pollutant exposure.
Future analyses using data with greater pollutant resolution, especially in the organic fraction, may elucidate some of the outstanding issues raised in the current analysis.
This may be owing to the lower number of burnings in this period [ 7], which generates a lower concentration of pollutants emitted into the troposphere and, associated to greater pollutant dispersion [ 50] during the rainy period, produced a reduction in %MCN at all the test points, in both exposures (active and passive).
From Figure 3, the greatest output pollutant would be NOX in electricity and SO2 in heat from Figure 4; PM10 would be a small value.
Spatial variability was much greater for pollutants with predominantly local sources (CO, NOx, and EC) compared with pollutants dominated by regional source contributions (PM2.5, SO4, and O3).
The basis for this assessment was the idea that measurement error can lead to bias toward the null in estimated associations, with the bias potentially being greatest for pollutants with the most measurement error.
