In this context, I define “intelligent” as “practicable” and “ready to implement,” not to mention “not gonna bankrupt us.” (One is tempted to say “shovel-ready,” but we won’t go there today.) Here’s a couple of such ideas, courtesy of Anthony Watts at Watts Up With That? Quoth the indispensable and scientifically-minded Mr. Watts:
From the University of Rhode Island, some ideas on putting waste city heat to good use. They seem to recognize what most climate scientists don’t. There’s a lot of heat in cities.
There is indeed a lot of heat in cities and other heavily built-up areas, thanks to major accumulations of concrete, asphalt and other efficient heat-absorbing materials, not to mention the cities’ own heat production. This is the notorious urban heat island (UHI) effect that skews temperature readings in/near such built-up areas. Anthony Watts’ poke at climate scientists in the above quote refers to the fact that, until quite recently, they have been unwilling to admit there is such a thing as UHI, because when you correct for it, alarmist-style global warming almost disappears. Now, apparently, at least a few climatologists have accepted its existence.
In any case, UHIs absorb a lot of heat during daytime and retain it far into the night, as can be attested to by anyone foolish enough to go barefoot on pavement during the summer. Apart from roasting human soles, this heat can be harvested and put to good use with proven technologies that exist today, as the informative University of Rhode Island article points out. Highly recommended reading.