Author
Infobase,
125
Films for the Humanities & Sciences (Firm)
111
Infobase
110
SpringerLink (Online service)
83
United States. Environmental Protection Agency
34
Public Broadcasting Service (U.S.)
25
ScienceDirect (Online service)
25
United States. Environmental Protection Agency. Office of Research and Development
16
United States. Congress. Senate. Committee on Environment and Public Works
15
United States. Environmental Protection Agency,
14
BBC Worldwide Learning
11
Green Planet Films
11
Green Interview (Firm)
10
United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response
10
Wild Hare Productions LLC
10
Ethical Markets Media
9
Film Ideas (Firm)
9
System TV (Firm)
8
4 Learning (Firm)
7
Council on Environmental Quality (U.S.)
7
Deutsche Welle
7
Geological Survey (U.S.),
7
Library of Congress. Congressional Research Service,
7
United States. Environmental Protection Agency. Office of Administration and Resources Management
7
United States. Environmental Protection Agency. Office of the Administrator
7
Geological Survey (U.S.)
6
Gore, Al, 1948-
6
United States. Environmental Protection Agency. Office of Water
6
Albatross World Sales (Firm)
5
Cable News Network
5
Oxford Scholarship Online
5
Parthenon Entertainment (Firm)
5
Public Affairs Television (Firm)
5
United Nations Environment Programme
5
United States. Congress. House. Committee on Resources
5
United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Environmental Protection
5
United States. Environmental Protection Agency. Office of Air and Radiation
5
Video Education Australasia
5
BBC Worldwide Ltd
4
Commission for Environmental Cooperation (Montréal, Québec). Secretariat
4
Fred Friendly Seminars (Firm)
4
Michael Conti Productions (Firm)
4
National Association of Home Builders of the United States
4
Risk Reduction Engineering Laboratory (U.S.)
4
U.S. Fish and Wildlife Service
4
U.S. Fish and Wildlife Service. Region 6
4
United States. Congress. House. Committee on Natural Resources,
4
United States. Congress. House. Committee on Resources. Task Force on Improving the National Environmental Policy Act
4
United States. Congress. House. Committee on Resources. Task Force on Improving the National Environmental Policy Act,
4
United States. Department of State
4
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