Smoking cannabis is still the most common method of intake in the United States. Inhaling the combustion of anything is not good for you. Recent studies are looking at how cannabis interacts with your lung tissue and whether that interaction causes harm. For anyone with breathing or pulmonary issues, I strongly suggest a candid conversation with your doctors and an education on the other option of cannabis intake. They don’t have to like it, as long as it’s safe for you, but they do have to respect your freedom of choice when it comes to your own healthcare.