New research by York University has revealed the danger of "third-hand" tobacco smoke. It reveals non-smokers, especially children, are at risk through contact with surfaces and dust contaminated with smoke gases and particles.
Researchers warn a study which shows more than 18,000 children took up smoking in Yorkshire and Northern Lincolnshire in 2011 should be seen as a child protection issue.
The researchers based their analysis on data taken from the 2011 'Smoking, drinking and drug use among young people in England' survey, which targets schoolchildren in England between the ages of 11 and 15 every year.
Questionnaires were completed by 6519 children in 219 schools.
A survey published today reveals shocking numbers of children taking up smoking in Yorkshire and Northern Lincolnshire.
In 2011, more than 18,683 eleven to fifteen-year-olds took up the habit - or 51 children per day. It's thought the figures could be on the increase this year.
Taking up smoking at a young age is an even greater risk to health than starting later in life, experts say. People who start smoking before the age of 15 run a higher risk of developing lung cancer than those who take up the habit later on.
Nicola Baines used the Smokefree Mums service when she became pregnant.
She's campaigning for other mothers-to-be to do the same, after it was revealed up to one in five expectant mums in the most deprived areas of Sheffield still smoke right up to the point of delivery.
Mums who have been part of developing the Smokefree Mum campaign have been talking about their experiences today.
Amy used the service throughout her pregnancy and says she couldn't have done it without the service run by Sheffield Teaching Hospitals and Sheffield Council.
A new campaign is encouraging pregnant women and new mothers to stop smoking. Smokefree Mum is run by Sheffield Teaching Hospital Trust and Sheffield City Council.
Currently in the city, 14.1% smoke at delivery stage, with more deprived areas in the city peaking at 19.5%.
Due to the health risks associated with smoking during pregnancy, and the increased treatment costs, the Government is aiming to reduce the number of mums smoking at birth to 11% nationally by 2015.
Councillors have added their backing to a new smoking campaign aimed at reducing the number of women who smoke while pregnant in Sheffield.
New mums have given their backing to a Sheffield health campaign, aimed at reducing the number of women smoking while pregnant. Figures show one in five are smoking at delivery stage in some parts of the city.
New mums are leading a health campaign aimed at reducing the number women smoking while pregnant in Sheffield. In some parts of the city one in five mums are still smoking at delivery stage.
The programme aims to raise awareness of the dangers of smoking while pregnant as well as offering help and support to those trying to quit.
The NHS is running a campaign throughout this month encouraging people to quit smoking, with the label of "Stoptober". One of the people taking part is Andrew Parker from Barnsley.