Book excerpt: Forests are critical to mitigation, having a dual role; they function globally as a carbon sink but are also responsible for about 10 to 12 percent of global emissions. Forests and forest products offer both developing and developing countries with a wide range of options for timely and cost-effective mitigation. Afforestation / reforestation offers the best option because of its short timescale and ease of implementation. Reducing deforestation, especially due to the possibility for immediate action. Yet forest contributions to mitigation. Wood products and wood energy can replace fossil-intense products in other sectors, creating a virtuous cycle towards low-carbon economies. The mitigation potential and costs of the various options differ greatly by activity, region, system boundaries and time horizon. Policymakers must decide on the optimal mix of options, adapted to local circumstances, for meeting national climate change and development goals. This publication assesses the options and highlights the enabling conditions, opportunities and potential bottlenecks. It will be supported by policymakers, investors and investors in their climate strategies. This publication assesses the options and highlights the enabling conditions, opportunities and potential bottlenecks. It will be supported by policymakers, investors and investors in their climate strategies. This publication assesses the options and highlights the enabling conditions, opportunities and potential bottlenecks. It will be supported by policymakers, investors and investors in their climate strategies.