steamy rear window..

anyone notice when you start to drive the car the exhaust vapour makes the rear window steam up a little when its cold out? (only revving to 2.5 / 3k rpm when cold)

anyone have any idea if this is normal or if you can avoid it?
 
Hmmmmm i noticed it once or twice but never really bothered me.
 
It's probably a ploy by the government to make you aware of the pollution coming out your car :wink:
 
I think this happens on most cars? My old Clio used to be the same.