Marijuana versus smoking cigarettes: does smoking weed have tar and all that bad stuff?

It has less: But nobody really knows, since it can be mixed with other plant products, and each "batch" may be very different from another batch. In general, the organic products found in marijuana smoke are not as harmful as those found in tobacco, but in heavy marijuana smokers can still result in bronchitis and even cancer, especially if the person also smokes cigarettes.