Walmart: Embedding sustainability in a vast supply chain Pure Strategies started working with Walmart in 2011 on its Sustainability Index, several years after the company announced its intention to leverage deep change within its supply chain. Aware that 90% of the company’s impact rests in its upstream supply chain, global retailer Walmart initially engaged its suppliers through a generic version of the Index in 2009. The Walmart Supplier Sustainability Assessment (SSA) Scorecard signaled the company’s intention to drive improvements by asking suppliers 15 questions about topics such as climate and energy, waste and materials, and people and community. The SSA received a significant upgrade when the much more comprehensive Sustainability Index launched in the fall of 2012. This time, the

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