Extracting the valuable metals from your smartphone

A BBC summit dedicated to exploring world-changing innovations in science, technology and health has been taking place in Sydney, Australia.

One of the speakers was Prof Veena Sahajwalla who wants to create a swathe of miniature furnaces that will recover valuable metals from discarded mobile phones.

She is championing the micro-factory: a recycling and reclamation system small and efficient enough that it can be set up in every community across the globe.

BBC Click's Jen Copestake finds out more.

Find out more about BBC Future's World-Changing Ideas.

More at BBC.com/Click and @BBCClick.