| 1 (8) | National Oceanic and Atmospheric Administration | USA |  |
| 2 (17) | United States Geological Survey | USA | |
| 3 (73) | United States Department of Agriculture | USA | |
| 4 (94) | National Aeronautics and Space Administration * | USA | |
| 5 (145) | Jet Propulsion Laboratory | USA | |
| 6 (186) | US Environmental Protection Agency | USA | |
| 7 (268) | Smithsonian Institution * | USA | |
| 8 (369) | NASA Goddard Space Flight Center | USA | |
| 9 (464) | United States Fish and Wildlife Service | USA | |
| 10 (473) | Smithsonian Environmental Research Center | USA | |
| 11 (499) | University of Maryland, Center for Environmental Science | USA | |
| 12 (532) | National Center for Atmospheric Research | USA | |
| 13 (639) | Lawrence Berkeley National Laboratory * | USA | |
| 14 (717) | U.S. Army * | USA | |
| 15 (777) | U.S. Department of Energy * | USA | |
| 16 (784) | Smithsonian National Museum of Natural History | USA | |
| 17 (879) | Oak Ridge National Laboratory | USA | |
| 18 (924) | Smithsonian Conservation Biology Institute | USA | |
| 19 (1008) | Pacific Northwest National Laboratory * | USA | |
| 20 (1017) | Oak Ridge Institute for Science and Education | USA | |
| 21 (1140) | Field Museum Natural History | USA | |
|
