How do your elevated hunting stands help with scent control?

I have heard it said that elevated hunting stands and blinds claim to help with scent and noise control?

 

Q: How do your elevated hunting stands help with scent control?

A: Whitetail deer have millions of olfactory receptors in their nose - compare 5 million in humans and 220 million in dogs - and deer have more! The incredible nose of a whitetail's sense of smell is estimated to be 10,000 times better than ours. This extraordinary  capability represents a deer's primary line of defense - and is pretty tough to beat 100% of the time. The enclosed deerstands and tower blinds tend to limit scent dispersal. Although not totally "scent proof" - the higher off the ground you are the scent zone  is far above the deer and factored with wind velocity and direction can make the real difference in your trophy whitetail deer hunting success.