Radiocarbon dating revealed the ancient fireplace to be around 12,300 years old, while morphological analysis suggested that the seeds belonged to a local tobacco species called Nicotiana attenuata
Here is a small collection of studies that have addressed the issue throughout the years: Breathhold duration and response to marijuana smoke 1989 Response to marijuana as a function of potency and breathhold duration 1991 Marijuana Smoking: Effects of Varying Puff Volume and Breathhold Duration 1995 A Cannabis Users Harm Reduction Handbook 2001 Effects of varying marijuana smoking profile on deposition of tar and absorption of CO and delta-9-THC 1991 2002 Effects of cannabis on lung function: a population-based cohort study 2009 Why is everybody confused
But mostly, Ive stood here at the grave
Its time to make the stigma apply to everything that contains nicotine.
The aim, from the outset, was to obtain standardised data about the amount of tar and nicotine in mainstream smoke, not to replicate the actions of human smokers
When someone stops using cannabis, they may experience a range of challenging symptoms