Hilawe, E
"North Korea Travel Rules and Tips"
cellulosic or other organic plant-derived fibrous materials e.g., cotton, wool, cedar, hemp, bamboo, kapok, or flax polyvinyl alcohol e.g., aliphatic polyesters, aliphatic polyurethanes, cis-polyisoprene, cis-polybutadiene, polyhydroxyalkanoates, polyanhydrides, and copolymers and blends thereof
The peer-reviewed, two-part regression analysis is too complex to describe here in detail, and the technical discussion has been relegated to "Appendix A: The Econometric Analysis." In general terms, however, the model compares legal, per-capita sales of cigarettes to survey data on the percentage of smokers in each state (the survey data comes from the "Behavioral Risk Factor Surveillance System" administered by the Centers for Disease Control and Prevention)
And if second hand smoke isnt bad enough, third hand smoke stays around even longer for weeks, months and even years