Clean Air Day 2019 will be on Thursday 20 June, coordinators Global Action Plan have announced, almost one year to the date of 2018's headline-smashing event.

It's early days yet, but if the feedback we're getting is representative of everything that we know took place in June 2018, it means that more than 1.2 million people were reached or engaged by a Clean Air Day event. 

But information is still coming in, and will have a more accurate picture when we publish our full evaluation in the autumn. 

If you held an event, please send in an evaluation form. It'll only take a few minutes and is tremendously useful in helping us establish the true impact of Clean Air Day. 

Remember, the Clean Air Day campaign is not just for one day of the year. Sign up for our Clean Air Day newsletter to keep up to date with the progress we're making, what others are up to - and be the first to hear about our plans for 2019. 

Main picture: Children at a school in Lambeth, London, celebrate the installation of a green wall to absorb pollution from a nearby road, as part of a week of events around Clean Air Day 2018