Smog and trucking.

The article focuses on the possible impact of the U.S. Environmental Protection Agency's (EPA) proposal to restrict smog standards in trucking industry. EPA proposes to set the primary ozone standard protecting public health. It expects that counties in nonattainment zones will collaborate with states and their plans on transmission-related emissions. Executive Allen Schaeffer predicts that its potential effect may originate from the state level and may become part of its nonattainment plan.