I was wondering if the author would mention District Heating, which arguably makes way more sense for effectively using this waste heat, and he did: "Many citi

I was wondering if the author would mention District Heating, which arguably makes way more sense for effectively using this waste heat, and he did: "Many cities in Europe already have insulated pipes in place for centralized “district heating.” Heat generated by data centers is beginning to be distributed to neighboring homes and commercial buildings — in Helsinki, for example." This is an infrastructure challenge, but many US cities already have district heating systems. New York's is the largest, but several other cities have it already. Wikipedia lists about 20, plus systems installed on university campuses. Surely some of these cities are good places for data centers that could be integrated into the network. http://en.wikipedia.org/wiki/District_heating#United_States http://en.wikipedia.org/wiki/District_heating#United_States