KALUNDBORG, Denmark -- What do the world's largest manufacturer of diabetes drugs, the biggest industrial enzymes producer and a leading offshore power company have in common? In the Danish seaside town of Kalundborg they have plenty.
As pioneers of so-called industrial symbiosis, these companies swap waste and byproducts to cut costs and carbon dioxide (CO2) emissions profitably -- an approach that offers big business a financial incentive that could be crucial to nations striving to meet targets agreed at this month's global climate summit.