Actually, Cannabis, especially the CBD’s can reduce inflammation to the lungs but if you smoke cannabis versus vaporizing or tinctures and other preparations, you may not be helping yourself very much because you lose some of the protective effects your lung naturally possesses. Vaporizing Cannabis tends to keep the medication in the upper part of the lungs and does not appear to suppress the immune system in the lungs. Smoking does tend to carry a lot of particulate matter into the lungs and promotes inflammatory disease.
I suggest you stay with CBD edibles to avoid any the additional damage to the Lungs.
Hopefully, you have already stop smoking nicotine because it’s very destructive.