Based on a global review of over 280 case studies, this report discusses the spreading phenomenon of markets for environmental services in the forestry sector. For a growing number of policy-makers, non-governmental organizations and academics, markets for carbon sequestration, biodiversity conservation, watershed protection and landscape beauty offer a new opportunity to promote responsible forestry, raise economic efficiency and reduce government spending. Yet such enthusiasm is often not matched by understanding of what such markets entail or how they will impact on people.