why does it smell like cigarette smoke do I when there is none? Cigarette Odor Removal | Smoke

Bottom line: If you're still using lightweight, forgettable lighters, you're leaving style on the table

Dimensions: 3559 x 5356 px | 30.1 x 45.3 cm | 11.9 x 17.9 inches | 300dpi Date taken: 26 May 2012 Location: Hemel Hempstead, Hertfordshire, UK More information: Model released image of a bride at a traditional British wedding

Smokers were classified into four categories according to the amount of smoking: light smokers (0.025 to 5 smoking pack-years), medium smokers (5 to 14 smoking pack-years), heavy smokers (14 to 26 smoking pack-years), and extreme smokers (more than 26 smoking pack-years)

School attendance was high during the study, and teachers confirmed that most learners were present, minimizing potential non-response bias