Yea no; Inhalation of chemical vapor is the chief way of treating asthma; they are called inhalers and nebulizers and atomizers/vaporizers. The chemicals found in marijuana smoke unlike most other forms of smoke; Are non carcinogenic In fact thc and cbc chemical chains are proven to send cancer into remission and trigger cellular repair as well as other beneficial factors. Yea there are other forms of particulates in the smoke they are much different than tobacco smoke or wood burning fire smoke; Most notable difference is lack of carbon monoxide. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1277837/pdf/1477-7517-2-21.pdf Thats a government study that shows chemical composition of cannabis vs tobacco and [b][i][u]cancer reversing effects[/u][/i][/b] of smoking weed. Also you may wish to check our the documents referenced in that government medical journal study release.