In the U.S., we ventilate just about everything to within an inch of its life. In Paris, entire spaces like elevator lobbies, restrooms, and subway cars go wanting in the whole vent+fan department. And disproportionate energy consumption be damned, on a day like today I gotta give the nod to the US of A. It was, um, really hot -- 31 C which, according to my calculations, is like 175 F.
So it was a huge relief when the rain broke this evening (blurry picture below). Viva la ventilation!