Nike has developed a closed-loop business model to achieve zero waste throughout the supply chain with a goal of no pre- or post-customer waste. According to a study "MapChange 2010," Nike received the highest score in the apparel sector based on climate-count methodology, accounting for environmental footprint, reduced impact on global warming, support for climate legislation, and disclosure of climate actions. In a recent survey taken by Angus Reid Public Opinion, Nike was rated as one of the top two companies in the world in addressing climate change.
Wal-Mart has taken aggressive initiatives towards sustainability since 2005 as is now widely recognized as global sustainability leader. They are also requiring their suppliers to conform to exacting sustainability standards. The company is committed to developing a sustainability index, so that customer would know the environmental impact of the product that they buy. Wal-Mart aims to cut 20 million metric tons of greenhouse gas emissions from its supply chain by 2015 (roughly equivalent to taking 3.8 million cars off the road).
Source: Galvao, A. "Industry giants embrace sustainability." APICS Magazine, May/June 2010.