How Do They Do It - Macadamia Nuts; Tap Water; Crowd Barrier

Seizoen: 13 - Aflevering: 13 / 219 - Eerst uitgezonden: 15 augustus 2015 - Episode ID: 1195191

South Africa's macadamia farmers; Chicago's water-filtration system. Also: the use of Mojo Barriers to keep music fans safe at the Pinkpop Festival in the Netherlands.