Secondhand smoke is very dangerous, especially for children. It causes numerous health problems, including more frequent and severe asthma attacks, ear infections, respiratory infections, and sudden infant death syndrome. (1)
A new law protects children from secondhand smoke. From October 1st will be illegal to smoke in cars that have kids in them. If you are caught, you are going to pay up to $80. (2)
According to the Department of Health, a secondhand smoke means breathing in thousands of chemicals which is almost the same as the smoker breathes in.
The law will be applied for any private vehicle, no matter if your window is open or a sunroof up. Even if you are parked with the door open, the law still applies. The only one exception is a convertible vehicle with a completely opened roof.
Boats, ships, and aircrafts are not affected by this law, because they have their own rules. Also, the public transportation which have smoke-free laws attached to them are not affected.