RD&D research, development, and demonstration

RRAM Recoverable Reserves at Active Mines

SMCRA Surface Mining Control and Reclamation Act

SNG substitute natural gas (also known as synthetic natural gas)

UIC Underground Injection Control

UMWA United Mine Workers of America

UNECE United Nations Economic Commission for Europe

USACE U.S. Army Corp of Engineers

USBM U.S. Bureau of Mines

USGS U.S. Geological Survey

WEC World Energy Council

WEO World Energy Outlook

WETO World Energy, Technology, and Climate Policy Outlook



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