Circulose wants to put the “circular” in “cellulose.” The brainchild of Swedish startup Re:newcell, Circulose is the first 100 percent recycled fashion fiber to be produced from old jeans, T-shirts and other discarded clothing at an industrial scale. Re:newcell has dubbed the fabric “climate-friendly”; the process of making Circulose, it claims, ends up storing greenhouse-gas…