“Add one more data point to the decades-old debate over marijuana legalization: A new study concludes that casual pot smoking – up to one joint per day – does not affect the functioning of your lungs.”
“The study, published in the Jan. 11 edition of Journal of the American Medical Association, also offered up a nugget that likely will surprise many: Evidence points to slight increases in lung airflow rates and increases in lung volume from occasional marijuana use.”
Read more: http://www.cbsnews.com/8301-205_162-57356548/study-no-lung-danger-from-casual-pot-smoking/