§Puff for puff, smoking marijuana is more dangerous than smoking cigarettes. http://162.99.3.213/products/manuals/matrix/ppt/marijuana.ppt [4]
Links
[1] http://www.samhsa.gov/atod/cannabis
[2] http://www.rethinkpot.org/tags/samsha
[3] http://www.rethinkpot.org/tags/cigarettes
[4] http://162.99.3.213/products/manuals/matrix/ppt/marijuana.ppt