• 1 College Library
• 1 Middleton Shelving Facility
• 1 Steenbock Library
• 1 Wisconsin's Water Library

• 8 Pollution
• 5 Health aspects
• 4 Corrupt practices
• 4 Physiological effect
• 3 Gas industry
• 3 Groundwater
• 3 Hydraulic fracturing
• 3 Marine pollution
• 3 Natural gas
• 3 Prospecting
• 3 Quality
• 3 Water
• 2 Accidents
• 2 Agricultural pollution
• 2 Bottled water
• 2 Bottled water industry
• 2 Cities and towns
• 2 Ecology
• 2 Economic aspects
• 2 Environmental law
• 2 Environmental policy
• 2 Factory and trade waste
• 2 Gas

• 3 Bullfrog Films
• 2 Adlesic, Trish
• 2 Docurama (Firm)
• 2 Fox, Josh, 1972-
• 2 HBO Documentary Films
• 2 Hedrick Smith Productions
• 2 International WOW Company
• 2 Public Broadcasting Service (U.S.)
• 2 Sanchez, Matthew
• 2 WGBH Educational Foundation
• 1 42 Productions (Firm)
• 1 Anne & Phelim Media (Firm)
• 1 Atlas Films
• 1 Basel Action Network
• 1 Beer, Cara
• 1 Beer, Ron
• 1 Beer, Tanya
• 1 Billings, Robert
• 1 Blakewest, Vivien Hillgrove
• 1 Boekelheide, Todd
• 1 Brandt, Jason
• 1 Calaman, Stanford
• 1 Cinedigm (Firm)
• 1 Clark, Dorie
• 1 Clarke, Michèle

• 16 English
• 1 French

• 11 United States
• 2 Atlantic Ocean
• 2 Chesapeake Bay
• 2 Chesapeake Bay (Md. and Va.)
• 2 Marcellus Shale
• 2 Massachusetts
• 2 Pacific Ocean
• 2 Puget Sound
• 2 Puget Sound (Wash.)
• 1 Africa
• 1 Canada
• 1 Concord
• 1 Leominster
• 1 Maryland
• 1 Nashua River (Mass. and N.H.)
• 1 New York
• 1 New York (State)
• 1 Oklahoma
• 1 Ottawa County
• 1 Pennsylvania
• 1 Tar Creek (Okla. and Kan.)
• 1 Virginia
• 1 Washington
• 1 Washington (State)

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