How Do They Do It?

Season 16 Episode 9: Tractors, Cow Bells, Street Lights

How do they build a tractor every three minutes to power Indian agriculture? How do they cast the bronze bells that help Swiss farmers keep track of their cows?

Genre:

Documentary

Seasons:

17

Episodes:

287

Cast:

Quality:

HD

Duration:

22 min

First Air:

2006

Rating:

7.5