I don't think the guy mentioned really ate 300 joints a month for years...
There are inhalents that go right into your lungs and help you. Decongestion, a direct medicine to your bloodstream, a whole bunch.
"...classification system lists four general categories of inhalants — volatile solvents, aerosols, gases, and nitrites..."
I'm 82. Would not have gotten this far, and in such active health** without cannabis. Being with a bag of smoke enables me to not only bear, but ignore pain that otherwise cripple me. <-- The double-plus part? Being active means I stay healthy and fit -- rather than bent over and curled up. Chalk up that status to the cannabis WIN column.
**See crossbow thread
Now go light the fukk up and enjoy.
It will make you live longer and happier and healthier.