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Smoking had an adverse impact on both sperm concentration and total sperm counts with smokers having significantly lower sperm concentrations (median 60 versus 66 10 6 /ml, P = 0.02) and lower total sperm counts, (177 versus 226 10 6 , P 3.0.CO;2-F Harlev A, Agarwal A, Gunes SO et al (2015) Smoking and male infertility: an evidence-based review

Here's the approved language for Copenhagen Classic Snuff: If you smoke, consider this: switching completely to this product from cigarettes reduces risk of lung cancer

Hon had himself quit smoking, after his father, also a heavy smoker, had died of lung cancer

Do you get your information from other review sites (like Wirecutter, for example), and what is your personal background