How Do They Do It?

Season 14 Episode 4: Helmets, Tea, District Heating

How do they harvest and treat the world's most expensive tea? Plus, how does the Siekierki power plant of Warsaw, Poland heat half the city's homes?

Genre:

Documentary

Seasons:

17

Episodes:

287

Cast:

Quality:

HD

Duration:

22 min

First Air:

2006

Rating:

7.5