ced since the 12th century, some
ocess discarded textiles (above). After
ded (below), it’s spun back into yarn.
ecycled into new clothing.
In Kalundborg, Denmark, 11 companies cooperate to convert waste into resources.
Novo Nordisk, which makes insulin, uses steam from a nearby power plant to sterilize
equipment (above). It sends massive amounts of yeast slurry to a bioenergy plant,
where a technician tests a spoonful (below), and microbes process it into natural gas.BY-PRODUCTS