Sale of tobacco should be phased out in the next 25 years , experts say . Claim 50 million deaths could be averted by the end of the century . United Nations should take a lead role in the 'turbocharged ' campaign .
Sale of tobacco should be phased out in the next 25 years , experts say . Claim one billion deaths could be averted by the end of the century . United Nations should take a lead role in the 'turbocharged ' campaign .