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

Seizoen: 12 - Aflevering: 13 / 195 - Eerst uitgezonden: 13 augustus 2015 - Episode ID: 1184783

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.