I like a bit of fresh air in the morning (if you can call the air in Shanghai fresh of course), but taxi drivers seem to be much bigger fans than I am. Whatever temperature it is, and whether it rains or not, they tend to open at least one window during the ride.
This morning was an extreme case: the driver that came to my place to pick me up, was sitting in his car reading the newspaper with all four windows open. And it was only 3 degrees outside! I assumed he would put the windows up when driving off, but I was wrong. In order not to end up with pneunomia I decided to do close the windows in the back seat myself and I asked the driver to do the same with the front ones. He reluctantly did so, but left his own window half open. Some things I will probably never understand.