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Fundraisers often sell T-shirts as a way to raise money for charity or non-profit organizations.

References (1) Press release: E-cigarettes around 95% less harmful than tobacco estimates landmark review (2) Electronic Cigarettes: Past, Present, and Future (3) Smoking - Help Me Quit: Are you Really Serious About Stopping Smoking

There is also the secretion of more mucus because the cigarette smoke irritates the lining of the airways which stimulates the cells to secrete more

The key differences lie in the heating method and device compatibility

"Electronic Nicotine Delivery Systems: Executive Summary of a Policy Position Paper From the American College of Physicians"

The bads very obviously outweigh the goods, and for that reason, habitual smoking fails to satisfy the second criterion above