Which is worse marijuana or cigarettes?

Smoking a single marijuana joint is equivalent to smoking 2.5 to 5 cigarettes in terms of damage to the lungs, largely due to differences in how pot and cigarette users smoke.

marijuana is definitely worse

I don't think the answer to this is cut and dry. If you're smoking 20 or 30 cigarettes a day and only a couple of joints the cigarettes are (in my opinion) causing more physical harm than the weed. On the other hand cannabis has the potential to be more harmful mentally than nicotine. There are safer ways to use each one. If it were me and I was trying to determine which one to kick first I would choose the one that I felt was causing me the most harm.