Esworthy, Robert, <br/><br/>
Air quality :  EPA's 2012 changes to the particulate matter (PM) standard  / 
 Air quality: Environmental Protection Agency's 2012 changes to the particulate matter (PM) standard 
Robert Esworthy. 
 - [Library of Congress public edition]. 
 - 1 online resource. 
 - Report / Congressional Research Service ; ;  R42671 .
 - CRS report ;  R42671. .
<br/><br/> The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; earliest version dated [2012].  GPO Cataloging Record Distribution Program (CRDP). 
<br/><br/>Report includes bibliographical references. 
<br/><br/><label>LCCN: </label>2019241758 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Particles--Environmental aspects--United States.<br/>Air--Pollution--United States.
<br/><br/><label>GPO Item No.: </label>0807-A-07 (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>LC 14.23:R 42671/