Green Portfolio Program achieves $160 million in savings after two years.

Environmental Defense Fund and Kohlberg Kravis Roberts & Co. L.P. (KKR) have been working together since May 2008 to develop and test a set of analytic tools and metrics to help companies in KKR's U.S. portfolio measure and improve performance in several key environmental performance areas.

As a result of this partnership, EDF developed Green Returns, an innovative and flexible approach designed to create business and environmental value for the private equity sector.

Green Returns provides resources and tools that any firm can use to evaluate operations and identify opportunities to improve business and environmental performance in five key environmental areas.

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