Dr. Thomas Hering explains the mechanism of tobacco addiction.
Research has shown that reducing nicotine levels means people smoke less often. US regulators now want to shift people toward e-cigarettes.
Measures aimed at curbing tobacco-related deaths now reach more than 60 percent of the world's population, the WHO says. But attempts by the tobacco lobby to sway government policy remain a "deadly barrier."
Tobacco and alcohol consumption is falling, but a graying Germany is at risk of becoming more dependent on pharmaceuticals.
The percentage of people who smoke has fallen in most countries since 1990, but the total numbers of smokers and smoking deaths have risen, a study says. Half the tobacco-related mortalities occur in just four countries.
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