As Seen Through Lead.

The article reports on the proposed revisions made by the EPA (Environmental Protection Authority) to the national ambient air quality standards (NAAQS) for lead. The proposal seeks to improve the existing lead monitoring network which requires monitors to be located near large sources of lead emissions an in urban areas with more than one million people. The proposal may serve as a precursor of other things to come with regard to EPA's treatment of non-threshold criteria pollutants as lead is an important criteria air pollutant.