Clean Air Day Clean Air Day 2017 (which we coordinated alongside 100 supporters) was a smash hit, trending at No.1 on UK Twitter for 5 hours. Our air quality messages had a potential reach of 86 million! The good news? We're doing it all over again in 2018! On 21 June, people around the UK will be coming together again to improve air quality. Schools, youth groups, community groups, local authorities, businesses, hospitals all talking about and taking action on air pollution. If you want to get involved, visit the Clean Air Day website to find out more and download our free toolkits. Be sure to follow us on Twitter for more updates. To find out more about the success of Clean Air Day 2017, download the Celebration Report. Please contact [email protected] with any queries.