Waterpipe associated particulate matter emissions
Several independent variables were examined in the study, including sociodemographic characteristics such as age (1524, 2534, 3544, or 45 years), sex (male or female), marital status (not married or married), education (no formal education, middle school and lower, high school or equivalent degree, or college or higher), employment status (government, private, self-employed, student, housewife, or unemployed), and residency (rural or urban)
This would allow for a more direct inspection of whether and how these clusters further divide
Theres something about flicking that cigarette butt Its so automatic, Cindy Zipf, executive director of Clean Ocean Action, a non-profit organization, had told National Geographic