Cannabis Smoke and Cancer: Assessing the Risk
Cannabis Smoke and Cancer: Assessing the Risk - NORML

Cannabis and tobacco smoke are not equally carcinogenic
Cannabis and tobacco smoke are not equally carcinogenic

Smoking Marijuana Does Not Cause Lung Cancer
US: Web: Study: Smoking Marijuana Does Not Cause Lung Cancer

Three studies should be enough, but there are more in the link below. I've been toking 40 years- the main problem was that my lungs didn't like the smoke. It took less than 2 weeks to clear up 40 years of "smoke abuse". Vaping is the way to go!- Granny:hippy: