Author
Organisation for Economic Co-operation and Development
384
United States Environmental Protection Agency
359
United Nations Environment Programme
333
National Public Radio (U.S.)
288
Films for the Humanities & Sciences (Firm)
222
Films Media Group
212
Aharon, Michael
200
ebrary, Inc
200
United States General Accounting Office
169
United States Congress. Senate. Committee on Environment and Public Works
167
United States Environmental Protection Agency. Office of Research and Development
165
Ḳol Yiśraʼel
157
SpringerLink (Online service)
106
ProQuest (Firm)
100
Library of Congress Congressional Research Service
96
China Guo jia huan jing bao hu zong ju
95
United Nations Economic Commission for Europe. Committee on Environmental Policy
90
Canada Environment Canada
73
Geological Survey (U.S.)
73
Council on Environmental Quality (U.S.)
70
European Environment Agency
70
United States Department of State
67
International Union for Conservation of Nature and Natural Resources
65
United Nations Economic Commission for Europe
62
World Bank
61
Alexander Street Press
60
United States Environmental Protection Agency. Office of Solid Waste and Emergency Response
58
United Nations Conference on Environment and Development
57
De Gruyter
56
United States
56
Stavins, R. N (Robert N.), 1948-
53
United States Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
53
Golan, Aryeh, 1947-
51
United States Environmental Protection Agency. Office of the Inspector General
48
United States Congress. Senate. Committee on Foreign Relations
47
Taylor & Francis
43
World Resources Institute
41
Gore, Al, 1948-
40
United Nations Development Programme
40
Council of Europe
39
United States Environmental Protection Agency. Office of the Administrator
37
Asian Development Bank
35
Dean, Alison
35
Global Environment Facility
34
United States Agency for International Development
34
Public Broadcasting Service (U.S.)
33
United States Environmental Protection Agency. Office of Policy, Planning, and Evaluation
33
United States Farm Service Agency
32
Inter-university Consortium for Political and Social Research
31
United States Environmental Protection Agency. Library Systems Branch
31
more ...