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Hand Pull Out Cigarette Packcigarettes Addictive Stock Photo 1514007308 Shutterstock Smoking One Pack of Cigarettes Per Day Causes 150 Extra Mutations in Lung Cells Respiratory Therapy Most people think smoking only becomes dangerous when they are going through a full pack, but new research is showing something far more alarming. Even two cigarettes a day can raise your How many do you guys smoke a day? What do you consider a heavy smoker? And do you enjoy smoking or smoke out of habit? : r Cigarettes Smoking A Pack Of Cigarettes A Day Causes 150 Mutations A Year In Every Lung Cell IFLScience

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