When Sally Mason, president of the University of Iowa, called for an increased focus on sustainability in the university’s operations as a key strategic initiative on Earth Day 2008, her ambitious plan presented a serious challenge.

Waste Management, Inc., based in Houston, Texas, is the leading provider of comprehensive waste management services in North America. Through its subsidiaries, the company provides collection, transfer, recycling and resource recovery, and disposal services. It is one of the largest residential recycler and also a leading developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. The company’s customers include residential, commercial, industrial, and municipal customers throughout North America.