The document discusses examples of sustainable urban projects from different cities that help break down barriers to integrating sustainability. It highlights a green streets program in Portland that uses bioswales for stormwater remediation and neighborhood revitalization. In Durban, a system was incorporated to generate hydro and micro hydro power from a freshwater distribution system to power 20,000 homes. It also notes the Olympic Village and Convention Center project in Vancouver as an exception that helped change sustainability rules.