While smoking was once common and accepted in commercial flights, todays universal bans protect passengers and crew from the dangers of secondhand smoke and fire hazards
Tests have shown maximum cigarette temperatures ranging from 400C (760F) to 780C (1,440F)
To help communicate the dangers of exposure to secondhand smoke findings as widely as possible, the US Surgeon General unveiled an easy-to-read guide with practical information on the dangers of secondhand smoke and steps people can take to protect themselves called The Health Consequences of Involuntary Exposure to Tobacco Smoke: A Report of the Surgeon General
Price, Accessibility, and Market Positioning Price and availability further highlight the contrast in the Double Happiness vs Chunghwa comparison
There is also some evidence that under some conditions dual use is more harmful than smoking alone, particularly for the respiratory system
Chaloupka FJ, Warner KE (2000) "The Economics of Smoking"