Different shades of green : green infrastructure research at the Environmental Protection Agency.
- Physical Description: 1 online resource (12 unnumbered pages) : color illustrations
- Publisher: [Washington, D.C.] : Environmental Protection Agency, 
|Source of Description Note:|| Description based on online resource; title from PDF title page (EPA, viewed Sept. 13, 2017).
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|Subject:||Infrastructure (Economics) > Research > United States.
Sustainable development > Research > United States.