0
30,000 people die a year from health defects caused by marijuana, such as heart attacks.
See the related link below.
If you are talking about overdoses, the answer is zero. No death from marijuana overdoes has ever been recorded in Canada or in an country, ever.
Except this one - http://www.timesonline.co.uk/tol/news/uk/health/article999100.ece
Marijuana seeds
None
Yes