Here are three videos that touch on the issue of how second hand smoke compares to actual smoking:

 

Video Title	Dial-Up	HS/BB	Audio	Length	Added
The Palmolive bottle demonstration	2.84mb	19.1mb	1.15mb	07:45	10/11/06
See how smoking destroys the lungs	1.55mb	4.59mb		04:13	11/27/06
Lung cancer	3.04mb	6.55mb		18:48	11/05/06