If you hate your parents smoking when you're in the car, you're not alone.
More than 15,000 people have signed a petition asking the government to make smoking in cars when children are passengers illegal.
Research by the British Lung Foundation found 86% of children across the UK want people to stop smoking when there are kids in the car.
Nearly a quarter of eight to 15-year-olds said they were embarrassed to ask adults to put out their cigarettes.
YOUR views on smoking in cars
A group of children have handed in the smoking petition to 10 Downing Street for the Prime Minister to read.
Latest figures show around four million people in the UK still smoke near children.
And every year more than 300,000 children in the UK go to the doctors with illnesses that are related to breathing in other people's cigarette smoke, like asthma.
There is a smoking ban in public places in England, but it doesn't apply to people's own space, like their homes or cars.