Vaping: How popular are e-cigarettes?
How much is being spent on e-cigarettes, and how safe are they?
1.Vaping is increasingly popular
According to the World Health Organization, there has been a small but steady decrease in the estimated number of smokers globally, to just over one billion.
The number of vapers has been increasing rapidly - from about seven million in 2011 to 41 million in 2018.
Market research group Euromonitor estimates that the number of adults who vape will reach almost 55 million by 2021.
2.Spending on e-cigarettes is growing
The e-cigarette market is expanding, as the number of vapers rises.
3.Is vaping safe?
One independent review concluded vaping was about 95% less harmful than smoking. Professor Ann McNeill, who wrote the review, said "e-cigarettes could be a game changer in public health".