RotterZwam
Rotterdam social enterprise growing oyster mushrooms on the city's spent coffee grounds and selling grow kits so you can do the same at home.
Netherlands·✓ Verified
Why it passes our bar
Closed-loop urban circularity with published numbers: over 419,840 kg of coffee grounds rescued from incineration, 26,693 kg of oyster mushrooms grown on them, and 144,164 kg CO2-eq avoided. The grow kit itself is made from leftover plastic buckets that would otherwise be destroyed, wrapped in recycled cardboard, and assembled in Rotterdam by people distanced from the labour market.
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