5 long term effects of chewing tobacco isn't just cigarettes. Smokeless tobacco, tobacco, and other forms consumption silently fuel some of the most serious health risks—from COPD and heart disease to oral cancer and life-threatening complications Snus: Smokeless Tobacco Facts and
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Cigarettes are nothing more than nicotine, tobacco and an assortment of chemicals wrapped in paper

Data adapted from Rubinstein et al

They cause blood vessels to expand, leading to flushing and swelling, as well as muscles to contract, causing coughing or gastrointestinal tract symptoms, in order to help flush out the threat

Nevertheless, he seems to allow smoking on Yom Tov in his halachic writings (see below)

Both tobacco smoking and cannabis smoking can cause health issues, although research on the effects of cannabis smoking on the lungs is less clear
