When present, thick, homogeneous and well-developed crusts, rich in either calcite or gypsum, partially shield the host rock from further pollutant absorption.
In the particular system studied here the infiltration points consist of a network of oil/silt separation devices with extensive further pollutant retention/degradation provided during the passage of stormwater through the sub surface zone.
In addition, he says, burning creates further pollutants.
Over time, stress from pollutants and their byproducts can cause cumulative plant damage, further reducing pollutant flux through the system.
As further air pollutant mitigation become more expensive and difficult, 'co-control' measure by new energy-efficient technologies is proposed to bring co-benefits.
The study methodology further characterizes pollutant distribution, fate, and transport by incorporating atmospheric dispersion modeling.
Depending on their levels of toxic emissions, industrial concerns could be required to take measures ranging from further reducing pollutants pumped into the air to warning nearby residents of the health risks of the emissions.
Indoors, cooking, smoking, and unvented combustion further contribute pollutants associated with pneumonia.
Further, few pollutants were measured consistently over time or in all 20 locations; for example, benzene was measured at 15 public sites in 1999 and 16 in 2004.
Further, because pollutants more refined than PM2.5 are still complex (e.g., EC, a subset of PM2.5, may have VOCs and metals bound to its surface), there remains a need for spatial models investigating distributions of specific PM2.5 constituents to evaluate their relationship with health outcomes.
To further investigate pollutant-mediated oxidative toxicity, we estimated lysosomal membrane stability and loss of DNA integrity as typical targets of environmental contaminants, which act through direct mechanisms or enhanced oxyradical formation (Moore et al. 2004; Regoli 2000; Regoli et al. 2004).
