The anti-smoking group Fresh and scientists from Newcastle University are backing a campaign showing that just 15 cigarettes can cause a genetic mutation, which could lead to cancer.
Latest figures reveal that more than 2,000 people died of smoking-related cancers in the North East in 2010.
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Feeling much colder later on Saturday. Wintry showers possible on Sunday and Monday
The pressure group Ashley Out has called for demonstrations outside every Sports Direct store within a 20-mile radius of St James' Park.