A charity in Cardiff wants tougher penalties imposed to tackle high levels of pollution in the city.
The British Lung Foundation said urgent measures are needed to protect people’s health.
Levels of air pollution in Cardiff are among the highest in the UK.
Cardiff Council is working with the Welsh Government to introduce Clean Air Zones.
Joe Carter from the British Lung Foundation Wales said urgent action is needed to save lives: “Even for someone without a respiratory condition, being on a busy road with lots of pollution, you can feel it in the back of your throat and feel yourself gagging. But if you do have a respiratory condition, or a cardiac condition, that can be deadly.”
This week the Welsh Government was ordered to come up with an action plan by the High Court.
Cardiff Council said it is committed to working with the Welsh Government to bring down the level of air pollution in the city, but that with 90,000 people commuting into the city by car each day, and cars being a major source of pollution, there is no simple solution.
In a statement, the council said: “We are currently working closely with the Welsh Government on the options available for a Clean Air Zone. We are only at the early stages of this process.”