A wide range of health and environmental organisations are deeply concerned about the impacts of air pollution, and many of these have been doing in-depth research into the damage that it does. You’ll find links to these below.
Royal College of Physicians:
Communicating the adverse effects of air pollution on health: progress report
If you’d like to organise a public event in your community focusing on air pollution and the need for Ella’s Law, there’s a presentation you can adapt here (PowerPoint file download).