They conclude that: The levels of ionic metals and metalloids, including chromium, nickel, and antimony, increased as the number of puffs increased, whereas concentrations of ionic zinc, copper, and lead were elevated at the start, and each device had different emissions
however, there are only three categories of products
However, it also noted that the risk for pulmonary complications even of regular heavy marijuana use is much lower than tobacco use, despite both substances having carcinogenic properties
However, there is also a disadvantage to this technology you cannot get a cigarette from the pack with one hand on the go :( (Especially if the pack is already half empty