Investors are even asking Amazon for more on sustainability. Calvert Asset Management Company filed another shareholder resolution in 2013 calling for Amazon’s board of directors to produce a report that details how the company is managing sustainability topics relevant to its operations. The resolution has gained considerable backing and Amazon says it will address the request. At the heart of Amazon’s operations rests its supply chain, complicated by the volume of transactions and associated companies and individuals selling on its website. Managing and disclosing sustainability issues in Amazon’s supply chain will be a difficult task.