States' role in protecting air quality  :  principles of cooperative federalism : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Sixteenth Congress, first session, March 5, 2019. 

 - 1 online resource (iii, 128 pages) :  illustrations. 
 - S. hrg. ; ;  116-6 .
 - United States.  Congress.  Senate.  S. hrg. ;  116-6. .
<br/><br/> GPO Cataloging Record Distribution Program (CRDP). 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States. Environmental Protection Agency --Rules and practice.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air quality--Standards--United States.<br/>Air quality management--States.--United States<br/>Environmental protection--States.--United States<br/>Intergovernmental cooperation--United States.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Legislative hearings.
<br/><br/><label>LC Class. No.: </label>KF26  / .E623 2019a 
<br/><br/><label>GPO Item No.: </label>1045-C (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.P 96/10:S.HRG.116-6