Dry herb vaporizers have existed for many years but have become increasingly popular due to the legal movement involving the medical marijuana industry. Herbal vaporizers function by heating up the dry material to the point where the active ingredients are released without burning the material. When any plant material is burned, something called combustion occurs and smoke is produced. Many people are now beginning to become aware that when combustion occurs, there are thousands of toxins that are produced and then inhaled into your lungs. Many of these chemicals include cancerous carcinogens that can be harmful to you and potentially lead to fatal consequences.