It's really amazing how many people I see driving with the windows up in their cars, A/C on of course, when it's 65-80 degrees outside. When I'm (rarely) riding in a car, I always have to at least crack the window a little no matter what the weather. It's just so stuffy and confining. The way I see it, one can adapt to the man-made environment, or the natural one that was here before us and will be here after us (assuming we don't destroy it first
).