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Composition of diesel exhaust varies with engine loading, producing differential health impact characteristics from the emissions

As noted in several prior posts, the study of the impact on diesel exhaust has focused on the PM10 and PM 2.5 profiles of the emissions. Recently, researchers argued that this view is too simplistic, and present an interesting study in support of their view. The researchers analyzed the composition...

Revisions to Key Definitions in Virginia Air Pollution Program Add Flexibility

By Henry R. "Speaker" Pollard, V , Partner, Williams Mullen Changes to Virginia’s air program that recently took effect offer greater flexibility for manufacturers, electric utilities, and other major sources of air pollutants. These changes reduce the rigidity of two key Virginia...