A new UNICEF report reveals that almost one in seven of the world’s children – or 300 million in total – live in areas with the most toxic levels of outdoor air pollution. These pollution levels are six or more times higher than what is allowed by international guidelines set by the World Health Organization (WHO).

The findings come a week ahead of the COP 22 in Marrakesh, Morocco, where UNICEF is calling on world leaders to take urgent action to cut air pollution in their …