half a pack of cigarettes a day Pack-years is way to measure smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org/lung From 30+ to 5 days

From 30+ to 5 days straight under half a pack : r stopsmoking To put that in perspective: spending a full day outdoors in "very unhealthy" air can be comparable to smoking about half a pack of cigarettes. Thankfully, smoke particles are large enough to Pack Years of Smoking and Lung Cancer Risk Charted: Cigarette Smoking's Decline in U.S. Young Adults See the full infographic: https: www.visualcapitalist.com the decline of cigarette smoking in u s young adults

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