Photo: AFPThe Local · 24 Aug 2016, 15:35Published: 24 Aug 2016 15:35 GMT+02:00Updated: 24 Aug 2016 15:35 GMT+02:00Parisians have been warned that there will be a high level of air pollution on Thursday, August 25th. https://t.co/ZwIP0o76v0 — Airparif (@Airparif) August 24, 2016Once the level of ozone particles in the air reaches a certain level, authorities have a duty to warn the public. Ozone pollution is predominantly caused by emissions from cars, and can be dangerous in high levels. In 2014 she unveiled an ambitious plan to make Paris free of diesel cars within five years, and to "semi-pedestrianize" the city centre. Story continues below…The World Health Organization says fine-particle air pollution is responsible for about 42,000 premature deaths in France each year.

Source: The Local August 24, 2016 13:30 UTC