Marijuana is no better than nicotine, unless you smoke it in real small amounts. I dont think theres really much you can smoke that wont damage your health. Although i like incense and i like to breathe it in.
Marijuana. Completely non-addictive and practically harmless. Any type of smoke isn't particularly GOOD for your lungs. The only thing bad for you about smoking marijuana is the plant matter itself in the smoke. If vaporized, it is 100% harmless.