The summary case studies contained in this document are meant to illustrate how cities can partner to achieve their clean energy goals. Whether it is Santa Fe Mayor Javier Gonazales’ Verde Fund, Salt Lake City Mayor Jackie Biskupski’s Climate Positive 2040, Boston Mayor Marty Walsh’s Renew Boston Trust, Las Vegas Mayor Carolyn Goodman’s “100 Percent Renewable Energy”, Kansas City Mayor Sly James’ HERO Residential PACE program, or Duke Energy’s Utility Collaborations with the cities of Charlotte and Asheville, North Carolina – all these model programs show that informed cooperation is the key to our mounting a sustained clean energy strategy from the local level up.