Chicago’s ban on smoking e-cigarettes indoors starts today.
The new rule prohibits people from using e-cigarettes inside restaurants, bars and most other public places in the city.
It also requires stores to sell e-cigarettes from behind the counter, making it harder for children to buy them.
The FDA recently announced it plans to begin regulating e-cigarettes.
It wants to ban sales to children and require manufacturers to put health warnings on e-cigarettes.