Degrees of Change: Building Materials. Feb 28, 2020, Part 1
![](https://media.wnyc.org/i/800/0/l/85/2020/02/Mjostarnet1-1.jpg)
The Mjøstårnet building in Norway, the world's tallest timber building.
( Peter Fiskerstrand, via Wikimedia Commons )
( Peter Fiskerstrand, via Wikimedia Commons )
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