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Kalamka, Juba (MayJune 2007)

In the Bronze Age as far back as 5,000 years ago we know the inhalation of burned plants was used in magic, ritual and medicine in such places as India, Mesopotamia and Egypt, while some archaeologists think Stone Age shamans probably inhaled hallucinogenic opiates to commune with the gods

doi: 10.1007/s40263-013-0116-4

However, tobacco smoke chemicals are much more challenging to eliminate than those of an actual fire
The American Lung Association states that inhaling smoke from any burning plant material can damage lung tissue and increase the risk of lung cancer
North America: 14.3% of cities met the guidelines
