Greening the data center Summary: John O'Brien, CTO of Dataupia, explains how carbon footprints are calculated in the data center and discusses ways to tame these power-hungry machines. November 27, 2007 -- 09:12 GMT (01:12 PST) Loading... Please wait. Topics: Hardware, Data Centers, Storage Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.