how to smoke cigarettes responsibly A Cigarette (according to WikiHow) Tobacco smoking - Wikipedia

While some effects of smoking, like staining, can be treated, others, such as gum recession and bone loss, can cause permanent damage

The most important development from those early efforts was educational nearly everyone at Hyde Park was against having second-hand smoke waft into their unit, but very few of us understood just how many of our neighbors felt the same way until we saw the poll results

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Tiny hairs in the airways, called cilia, sweep out toxins and other bacteria, but tobacco smoking prevent them from doing their job

#19 @peakbagger , @woodgeek , I am glad to have the extra eyes