Impressions

Smoke from charcoal contains many of the same
components as those most feared in tobacco smoke
(carbon monoxide, formaldehyde, carcinogens
and so forth). A ten pound bag of charcoal
produces as much smoke (and harmful chemicals)
as 160 packs of cigarettes.

So, are you going to quit barbecuing?

In truth, there is no association between lung
cancer and Environmental Tobacco Smoke (ETS), regardless of whether the source is spousal smoking or workplace ETS.

It's because of money, control, and jurisdiction.

Source:
http://www.smokingaloud.com/ets.html