Is San Francisco´s vaping ban backed by science?
(WorldNews France)

San Francisco has decided to ban the sale of e-cigarettes in 2020, hoping to curb a surge in vaping among adolescents. But is the policy backed up by the available evidence? – How harmful is vaping? – Unlike tobacco cigarettes, e-cigarettes do not “burn.� The devices, which have been available in the US since 2006, […] ......