To build this air pollution monitor, you only need a 3D printer, inexpensive components, and basic coding skills. The detector is called Flatburn and was designed by scientists at MIT. Their goal is for anyone to be able to monitor local air pollution levels. The data could then be used to help shape local policy-making, resulting in cleaner air for everyone. The researchers tested these air pollution monitors in cities around the world and calibrated the results against state-of-the-art sensors to ensure Flatburn is accurate and reliable. The Flatburn website contains everything you need to build your own unit and advice on understanding and using the data it collects. The researchers hope this will enable users to identify pollution trends and hotspots. Watch to learn more about these air pollution monitors.