TY - DATA AU - McCarthy,James E. AU - Comay,Laura B. ED - Library of Congress. TI - Protecting clean air in national parks and wilderness areas T2 - IF PY - 2018///- CY - [Washington, D.C.] PB - Congressional Research Service KW - Air KW - Pollution KW - United States KW - Prevention KW - Wilderness areas KW - National parks and reserves N1 - The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; earliest version dated 2016; Report includes illustrations; GPO Cataloging Record Distribution Program (CRDP); Report includes bibliographical references UR - https://purl.fdlp.gov/GPO/gpo137978 ER -