Forestry is important in greening the global economy, largely because it is a major carbon sink, and deforestation is a big contributor to global carbon dioxide emissions. Certification by the Forest Stewardship Council (FSC) provides access to the higher margin niche markets in those economies, it requires systemic greening and a "chain of custody" to verify greening throughout the chain (box 6.1). Although consumers and governments in high-income economies are increasingly sensitive to social and environmental concerns, the same is not always so in low- and middie-income markets.