How Do They Do It?
Tunnels/Timber
Season 12 Episode 20 of 20
Exploring the construction of large tunnels in one of the world's biggest cities to prevent blackouts, and a look at how a pine forest is turned into timber
How Do They Do It? airs on Discovery Channel HD at 10:30 AM, Tuesday 10 September. (Subtitles.)
Learn more about How Do They Do It? and other education/science/factual topics on our factual page
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