Legislation passed by parliament on Tuesday means that anyone born after 2008 will never be able to buy cigarettes or tobacco products."Thousands of people will live longer, healthier lives and the health system will be NZ$5 billion (US$3.2 billion) better off from not needing to treat the illnesses caused by smoking," Dr Verrall said.It is hoped that the Smokefree Environments Bill will reduce that number to less than 5% by 2025, with the eventual aim of eliminating the practice altogether.The bill is also designed to limit the number of retailers able to sell smoked tobacco products to 600 nationwide - down from 6,000 currently - and reduce nicotine levels in products to make them less addictive.Critics of the bill - including the ACT party which holds 10 seats in parliament - have warned that the policy could fuel a black market in tobacco products and kill off small shops."