This can lead to miscarriage, lower birth weight and is linked to learning difficulties, problem behaviour and asthma in childhood.

这会导致流产，低出生体重，并会导致孩子在幼年时的学习困难，问题行为和哮喘。

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The most pervasive problem is less obvious: our own behaviour.

最普遍的问题不那么明显：即，我们自己的行为。

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Bad behaviour is not the only problem.

恶意行为还不是唯一的问题。

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Earlier research with twins has also indicated a genetic predisposition to problem drinking behaviour as well as to the resulting liver damage, Dr Brind said.

BBC: Alcoholic liver disease linked to genes

But the council felt there was such a problem with behaviour it took the step of introducing a special order covering the estate, local businesses and a number of nearby terraces.

BBC: NEWS | UK | Wales | South East Wales | Night experiment cuts youth trouble

Today, boarded-up houses, graffiti, burned-out cars and a huge crime and anti-social behaviour problem have been replaced with sport's centres and libraries youth clubs.

BBC: Taking Back the Streets