24 hours after last cigarette Timeline of Lung Recovery Quitting Smoking After you stop smoking timeline

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A study in Italy found that cigarettes release 10 times as much particulate matter into the air as a diesel engine

Thats why you shouldnt rush to tap off the ashtry to keep at least a couple of centimeters, especially in the final third of the cigar, where the smoke tends to get hotter and harsher

Smoke particles can settle in air vents, carpets, upholstery, and even within the walls

Whilst I appreciate that CRUK have to be very considerate in terms of any position they take, and to be cautious with any statements to that effect, I do think it would to the Public Health community at large a world of good if they were to stop focusing entirely on statistical and chemical measurements, and actually *speak* to users of these devices and see the massive difference they make to their quality of life, and factor that into their studies and positions and without wishing to get to morbid, Im sure that quality of life is something CRUK would be familiar with for many of those it works with/for, and is not something that youd discount lightly