four cigarettes a day The poor air quality Thursday was the equivalent of smoking to six in day, according to a professor of public health at Lehigh University. https://mrf.lu/2G0sQ PDF) Health consequences of smoking
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Most commercial cigarette butts today consist of non-biodegradable synthetic plastics made from cellulose acetate

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Carbon Monoxide: A colourless, odourless gas that binds haemoglobin with high affinity, forming carboxyhaemoglobin and reducing oxygen transport

Public Health England say vaping is at least 95% less harmful
Even if you dont vape, you can develop health issues if you hang around people who do via secondhand vaping
But at that point, I didnt have a clue about what would really befall me