Ron Paul voters are jumping for joy (or MaryJane). From Bloomberg:
Occasional pot smoking doesn’t appear to harm users’ lungs the way regular tobacco use does, according to a 20-year study.
Patients who smoked only tobacco had 24 fewer milliliters of volume in the first second of an exhalation than an average nonsmoker; marijuana smokers who didn’t smoke tobacco had 0.7 more milliliters. The pot-only smokers also had 8.2 milliliters more air exhaled after a full inhalation, compared with those who smoked nothing, and the tobacco-only smokers had 19 milliliters less.