The document discusses the challenges of implementing energy efficiency and 'green' leasing practices in the retail sector, identifying it as a 'wicked problem' due to its complexity and diverse market segments. It highlights the need for collaboration between landlords and tenants to create effective green leases that address environmental issues and suggests that while green leases are often symbolic, they provide a platform for negotiation and cooperation. It calls for further research into the effectiveness and impacts of sustainable leasing practices.