| Regional Plan Association
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| Relocate Kivalina (Alaska Design Forum)
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| Resilience Alliance
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| Resilient Los Angeles
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| Resilience Metrics
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| Resilient Mystic Collaborative
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| Resilient Rural America Project
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| Resilient Virginia
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| Resources for the Future
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| Resources for the Future | Center for the Management of Ecological Wealth
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| Resources for the Future | Program on Using Natural Infrastructure to Build Resilience to Climate Change
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| Resources Legacy Fund
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| Restore America's Estuaries
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| RETScreen
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| Rhode Island Coastal Resource Management Council
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| Rhode Island Division of Planning
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| Rhode Island Sea Grant
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| Richard and Rhoda Goldman Fund
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| Richmond Regional Planning District Commission
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| Ridge to Reefs
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| Rise South City
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| Riverside Technology, inc.
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| Rocky Mountain Research Station
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| Roger Williams University Marine Affairs Institute
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| Rookery Bay Reserve
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