How Do They Do It?

Season 13 Episode 13

Macadamia Nuts, Tap Water and Crowd Barriers

Aired Thursday 9:00 PM Aug 13, 2015 on The Science Channel
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Episode Summary

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.

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