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US Geological Survey 2306 EurekAlert 1809 us environmental pro 689
UN Sustainable Devel 556 Imperial College Lon 532 World Resources Inst 528
Center for Strategic 527 World Business Counc 501 RAND Corporation 498
United States Depart 432 US Environmental Pro 413 Science 407
US National Scientif 406 World Wide Fund for 388 Scripps Institution 364
Convention on Biolog 317 Department of Conser 278 Department for Busin 276
United Nations Envir 257 Bruegel 237