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St. Paul, Minn.

Greening urban architecture

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Tree house
A tree house concept by Mitchell Joachim, an architect and Co-Founder at Terreform ONE, a non-profit design group that promotes green design in cities.
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Tree house
A tree house concept by Mitchell Joachim, an architect and Co-Founder at Terreform ONE, a non-profit design group that promotes green design in cities.
Submitted photo