[#item_full_content] Two RPI graduates built a 35,000 sq ft New York foundry that grows packaging foam from mushroom roots and hemp in 5 days — and the finished blocks compost 
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Packed into molds in upstate New York, 2 students’ hemp and fungal foam blocks grow rigid in 5 days and compost in a backyard in 45
ByPot Shop News
October 5, 2026