Common-pool resource issues refer to the challenges and problems associated with resources that are shared among multiple users, where individual consumption can deplete or degrade the resource, leading to overuse. These resources, such as fisheries, water sources, and forests, are characterized by difficulty in excluding users and the tendency for individuals to act in their self-interest, often resulting in the 'tragedy of the commons' phenomenon. This concept highlights the need for effective management and regulation to ensure sustainability and prevent resource depletion.