The Guide is focused on best practices for solid waste management in medium and large urban centers in developing countries because they face the most substantial solid waste management challenges. Given their waste generation projections, these challenges will only become more acute in the future and decision-makers have the opportunity to take important and effective action. Portions of the Guide might also be applicable to rural towns, villages, or other small jurisdictions. The Guide’s primary audience is state and local government authorities in these cities. These authorities typically include decision-makers, policymakers, and agency staff involved in solid waste management. Aspects of the Guide might be applicable to other stakeholders such as nongovernmental organizations, private sector actors, or residents.