It is the remaining tar and oils from the tobacco which cling to surfaces in your house
Farsalinos KE, Kistler KA, Gillman G, Voudris V
Cigarette brands were segmented into three hierarchical price categories (economy, mid-priced and premium) by the authors based on the price points in the market over the whole period of the study, following the WHO approach of weighted-average price tertiles.52 53 In order to compare packs of different sizes we used price per stick as the key measure
Cigarette revenues rose 8%, driven by 7% growth in volumes.However, margins in the cigarette segment fell to 59.9%, a multi-quarter low, contracting by 163 basis points year-on-year due to the consumption of high-cost leaf inventory
45, 46 A detailed analysis of the inflammatory infiltrates in a mouse model of chronic obstructive pulmonary disease (COPD) revealed that DC numbers in the airways raised gradually after a short period of continual smoking, reaching 10-fold levels after a chronic exposure for 6 months compared with the numbers in sham-exposed animals
