South of Scotland MSP Jim Hume is planning to launch a campaign to ban smoking in cars when children are present.
Australia, Canada and South Africa are among those countries who have already banned smoking in vehicles.
Mr Hume will consult on a proposal for a Members' Bill at Holyrood.
"Scotland faces an enormous challenge in changing our relationship with tobacco.
"By banning adults from smoking in their cars whilst children are present, we can build a fairer society which gives every child the best start in life.
"It doesn't seem fair that children should suffer from passive smoking during the school run.
"It doesn't seem fair that any child should have to be swallowed up in a cloud of tar and nicotine on their way to football or dance classes."
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