Noticed at Wed, 30 Jan 2008 11:03:24 -0800: Pete nospam Zakel informed us:

> Tobacco contains nicotine, cannabis doesn't.

It does sometimes, but only when comparing the carcinogens in burning
tobacco with those in burning cannabis.

http://pubs.acs.org/cgi-bin/sample.cgi/crtoec/asap/html/tx700275p.html

"It was surprising to find nicotine in the mainstream and sidestream
marijuana smoke (Tables 3 and 4). For mainstream smoke, of the 20
marijuana cigarettes examined under ISO conditions, 16 showed no nicotine
and none of those examined under extreme smoking conditions had any
evidence of nicotine. As nicotine is present in high concentrations in
tobacco, in the range of mg per cigarette, it was concluded that the
source of nicotine was cross-contamination from tobacco smoking."

They tested weed contaminated with tobacco. This junk science then led to
these headlines:

http://www.guardian.co.uk/society/2007/dec/19/drugsandalcohol.drugs

"Cannabis smoke more toxic than puffing tobacco"

They WERE puffing tobacco. There was nicotine in the marijuana smoke.

-- 
Dr John Watson
Baker Street