International corporation, Siemens, conducted a survey of 27 cities to quantify and stratify green/sustainable cities. Among the 31 objective factors that the study reviewed, San Francisco has risen among the group as the official municipal green leader.
Metrics reviewed for the study included: CO2/capita, water consumption, recycling/capita, LEED-certified buildings, and other key objective measures.
The full study can be found here.
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