We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Mobile Smog Simulator: New Capabilities to Study Urban Mixtures

A smog simulator developed by EPA scientists and engineers has unique capabilities that will provide information for assessing the health impacts of relevant multipollutant atmospheres and identify contributions of specific sources.

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.