cigarette put out device A for smoking a whole pack of cigarettes, 1950s. : r/HistoricalCapsule Vintage Cigarette Portable Litter Device

From my interpretation, it seems that Pope is saying that exposure to PM 2.5 begins to cause damage at very low levels, and increases steeply if you are a smoker, but then begins to level off -- aka the difference in mortality between smoking 20 a day and 40 a day is not much different

Although the consumption of these models is really good in comparison to their competitors, the dual zone (DZ) models with a fridge freezer still draw a lot of energy

International Journal of Epidemiology 2003: volume 32, issue 5, pages 802 to 808 (registration and subscription required for full article)

Contains 10 sticks per pack

those which lie below the grey line had more deaths in 2017

The other popular variety is the Robusta bean