It is impossible to avoid the environmental particulates you encounter every day, but secondhand cannabis smoke contributes to poor air quality and problems for lung health
Science makes use of controlled trials under particular conditions
Goodfellow, Susan, Marjorie Nowick, Chad Blackwell, Dan Hart, Kathryn Plimpton (2009) Nationwide Context, Inventory, and Heritage Assessment of Works Progress Administration and Civilian Conservation Corps Resources on Department of Defense Installations. Department of Defense Legacy Resource Management Program, Project Number 07-357, July 2009
Pellett (1994) Smoking and Raven IQ
Tobacco cigarette smoke not only increases vascular oxidative stress, but also contains free radicals itself, thus causing ED both by endogenous and exogenous sources [62]