Weed is healthier than tobacco to smoke because pot smoke does not have nearly as many carcinogens (toxins that cause cancer) as cigarette smoke. Also, it has been proven that weed can help cancer patients during chemotherapy. Weed can also help persons with HIV/AIDS by giving them the munchies and helping with stomach pains.
Two large studies reported no increase in death associated with the use of cannabis. Even diseases that might be related to long term cannabis use are unlikely to have a sizable public health impact because, unlike users of tobacco and alcohol, most people who try cannabis quit relatively early in their adult lives.
Exposure to smoke is generally much lower in cannabis than in tobacco cigarette smokers, even taking into account the larger exposure per puff. Existing studies do not support a link between the use of cannabis and heart disease, the leading cause of death in many Western countries. Furthermore, cannabis does not contain nicotine, a chemical contained in tobacco that is addicting and contributes to the risk of heart disease.
If you want no risk's with weed eat it. Learn how to cook it into brownies, or you could buy vaporizer (a vaporizer heats the cannabis to where the THC is released and no smoke.) so you can get pure THC. You get high A LOT quicker and you won't have any health problems that come with smoke.