The main challenges faced by businesses when implementing a sustainable supply chain strategy include identifying sustainable suppliers and building long-term relationships with them, managing complex supply chain networks and ensuring compliance with environmental and social standards. In addition, there may be cost implications associated with implementing sustainable practices and the need to educate suppliers and internal stakeholders on the importance and benefits of sustainable supply chain practices. Finally, the lack of transparency in supply chains can make it difficult to identify and address issues related to sustainability, including human rights violations, environmental damage, and other unethical or illegal practices.