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Boris Johnson, the Mayor of London, has shown no interest in the capital following New York in banning smoking in many open public places, although a voluntary ban has been tried in two public squares in Bristol and is being evaluated

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It takes around three months for new sperm to fully develop, so its important to quit smoking at least three months before trying for a baby

A single cigarette reactivates nicotine receptors in your brain, increasing cravings and making relapse much more likely

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It says that 1.2 million people a year are admitted to hospital because of alcohol related problems and that rates of liver disease in those under 30 have more than doubled over the last 20 years