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By Lucy Goodchild van Hilten
A warehouse filled with huge gleaming silver vats hums around the clock, as billions of yeast cells work to make a material we can wear, sit on and carry around. In an adjoining room, rows of benches hold molds of different shapes and sizes, where sheets of cellulose layer up and become recognizable. In the next room, the material is finished and packaged, destined for designers, tailors and upholsterers.