Although occurring naturally [ United Nations Environment Programme (UNEP) 2002], mercury is a global pollutant and concerns public health when it is elevated above natural background levels, mainly through anthropogenic causes (Boening 2000).
The abundance and growth of the Folsomia candida soil arthropod have been widely used to assess the environmental impact of a range of soil pollutants, and increasing concerns about environmental pollution require advanced and rapid methods to estimate ecological toxicity.
It assumed that all vehicles would meet the current federal "Tier 2" standards for smog pollutants and did not concern itself further with such conventional pollution, although a proponent of fuel cells could argue that they are cleaner.
A high threshold would result in PM2.5 and acrolein being the prime indoor pollutants of concern and formaldehyde being of lesser importance.
It should be progressively updated once new data on exposure limits and pollutants of concern become available.
However, many of these processes increase the risk of generating secondary pollutants, and therefore pose a concern from ecosystem health and public health viewpoints.
Heavy metals are deemed to be dangerous pollutants and have raised environmental concern due to their toxicity, persistence and non-degradability, bioaccumulation in organisms, and ultimately their effect on human health (Burgos and Rainbow 2001; Kress et al. 2004; Otero et al. 2005; Kurun et al. 2007; Du Laing et al. 2008).
Ahmed advocates a national water quality surveillance program that would monitor levels not only of arsenic, but of lead, manganese, organic pollutants, and other contaminants of concern as well.
According to Wathen,"arsenic and other pollutants of concern have been reported to EPA and ADEM, but no action has been taken".
Analysis of environmental as well as agricultural commodities for determination of pollutants especially, pesticides, is imperative for corrective and preventive planning concerning pollutants and human health.
