translate English to French: Review of U.S. Ozone and Particulate Matter Air Quality Standards EPA is currently reviewing the NAAQS for ozone; more information, including supporting documents, can be found at www.epa.gov/ttn/naaqs/standards/ ozone/s_o3_index.html. EPA reviewed the NAAQS for PM.
Les particules peuvent être émises directement ou se former dans l’atmosphère par la transformation d’émissions gazeuses, par exemple, de SOx, de NOx et de COV.