Which major food company launched the first comprehensive 'Supplier Sustainability Index' that requires food suppliers to demonstrate environmental improvements to maintain their contracts?

Sustainability has become a critical focus for food retailers and manufacturers worldwide. As consumers become more environmentally conscious, major companies are implementing innovative programs to reduce their ecological footprint while maintaining profitable operations. This poll tests your knowledge about which major food corporation has made the boldest commitment to sustainable sourcing practices through their comprehensive supplier program.

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Walmart (2012)
Kroger (2014)
Whole Foods Market (2010)
Carrefour (2015)