Yet a simple look at the chemistry shows us that its:
About 90% of secondary smoke is composed of water vapor and ordinary air with a minor amount of carbon dioxide. The volume of water vapor of second hand smoke becomes even larger as it qickly disperses into the air,depending upon the humidity factors within a set location indoors or outdoors. Exhaled smoke from a smoker will provide 20% more water vapor to the smoke as it exists the smokers mouth.
4 % is carbon monoxide.
6 % is those supposed 4,000 chemicals to be found in tobacco smoke. Unfortunatley for the smoke free advocates these supposed chemicals are more theorized than actually found.What is found is so small to even call them threats to humans is beyond belief.Nanograms,picograms and femptograms...... (1989 Report of the Surgeon General p. 80).