Author
SpringerLink (Online service)
479
Infobase,
124
Films for the Humanities & Sciences (Firm)
83
Infobase
82
ScienceDirect (Online service)
79
Geological Survey (U.S.)
78
Geological Survey (U.S.),
61
United States. Congress. House. Select Committee on the Climate Crisis,
50
SpringerLink (Online Service)
44
United States. National Oceanic and Atmospheric Administration,
28
Library of Congress. Congressional Research Service,
27
United States. National Park Service. Natural Resource Stewardship and Science,
25
Leal Filho, Walter,
20
Public Broadcasting Service (U.S.)
19
Western Water Assessment (Program)
16
Natural Resource Program Center (U.S.),
13
BBC (Firm)
11
United States. Congress. Senate. Committee on Energy and Natural Resources
11
United States. Congress. Senate. Committee on Environment and Public Works,
11
GeoChina International Conference
10
GeoChina International Conference HangZhou, China)
10
Leal Filho, Walter
10
United States. Environmental Protection Agency
10
United States. National Oceanic and Atmospheric Administration
10
Oxford Scholarship Online
9
Leggett, Jane A.,
8
Loehman, Rachel A.,
8
MacNeil/Lehrer Productions
8
United States. Environmental Protection Agency,
8
United States. Environmental Protection Agency. Office of Air and Radiation
8
United States. Forest Service,
8
Letcher, T. M.
7
Rocky Mountain Research Station (Fort Collins, Colo.)
7
U.S. Global Change Research Program
7
United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Environment and Climate Change,
7
United States. Congress. House. Select Committee on Energy Independence and Global Warming
7
United States. Congress. Senate. Committee on Foreign Relations
7
Azeiteiro, Ulisses,
6
Colorado Water Conservation Board
6
National Geographic Digital Media (Firm)
6
Pacific Northwest Research Station (Portland, Or.)
6
Rapp, Donald, 1934-
6
Schramm, Amanda,
6
United Nations Environment Programme
6
United States. Congress. House. Committee on Science, Space, and Technology (2011- ). Subcommittee on Environment,
6
BBC Worldwide Learning
5
Cable News Network
5
Canadian Broadcasting Corporation
5
Hodgkins, Glenn
5
Lins, Harry F.
5
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