Is smoking marijuana as bad for me as smoking tobacco?

No: A difficult question politically, but an easy one medically. Although marijuana is not without risks - the risk of tobacco smoking are far greater!

Research is mixed: According to the national institute of drug abuse, marijuana smoke contains 50-70% more carcinogens than tobacco smoke. Also marijuana smokers inhale more deeply and hold smoke in their lungs longer. http://www.drugabuse.gov/publications/drugfacts/marijuana these can lead to more lung irritation and cancer. Other studies say mj is not linked to tobacco-related cancers (lung, colon, rectal, etc).