Cannabis Smoke and Cancer: Assessing the Risk
http://www.norml.org/index.cfm?Group_ID=6891
Cannabis and tobacco smoke are not equally carcinogenic
http://www.pubmedcentral.nih.gov/art…?artid=1277837
Smoking Marijuana Does Not Cause Lung Cancer
http://www.mapinc.org/drugnews/v05/n1065/a03.html
Tobacco and marijuana use on offspring growth from birth through 3 years of age.
http://www.ncbi.nlm.nih.gov/sites/en…ubmed_RVDocSum
Progression from marijuana use to daily smoking and nicotine dependence
http://www.erowid.org/references/refs_view.php?ID=6951
High anxieties – What the WHO doesn’t want you to know about cannabis
http://www.newscientist.com/article/…-cannabis.html
Radioactive tobacco
http://www.cannabisculture.com/news/tobacco/
Some go without a cigarette: characteristics of cannabis users who have never smoked tobacco.
http://marijuana.researchtoday.net/a…/4/11/1483.htm
Cannabis use when it’s legal
http://www.sciencedirect.com/science…96c8de7949a364
Aluminum in Tobacco and Cannabis and Smoking-Related Disease
http://www.sciencedirect.com/science…14cf03f3b4bc4e
Marijuana Improves Fertility in Tobacco Smokers
http://news.softpedia.com/news/Marij…rs-41535.shtml