Particles of concern.(Concerns EPA 's proposed new standard for particulates) Author Yuhnke R. Journal/Series The Environmental Forum | Vol. 14(2); 24 - 29; 6 p. Date 1997 Source IUCN (ID: ANA-060284) Publisher | Place of publication Environmental Law Institute | Washington, DC, USA Language English Country/Territory United States of America Subject Air & atmosphere Keyword Air quality/air pollution Emission standards