This isn't groundbreaking research or anything. He does give a few examples of his rebound [<a href="http://en.wikipedia.org/wiki/Rebound_effect_(conservation)" rel="nofollow">http://en.wikipedia.org/wiki/Rebound_effect_(conservation)</a>]. Paraphrased: while the average energy consumption to heat 1m^3 went from 365kWh in 1973 to 215 in 2005, energy devoted to heating rose 20%. Average temperatures in residential buildings rose from 19 to 21ºC.<p>He can't reasonably pin all these increases on 'Green Tech' alone though. (Maybe people don't wear fancy suits as much, instead opting for t-shirts. Voila more chauffage.) Cheap heat probably does make it easier for someone to kick up the thermostat, but so do other factors he neglects to mention.