Drawing on the expertise of more than 50 experts, this report explores the corruption risks related to tackling climate change. The analysis includes a set of policy recommendations and it covers four key areas: governance, mitigation, adaptation and forestry governance. The report observes that the risk of corruption is high, because the efforts to prevent and respond to climate change involve large amounts of money, and there is a pressure to 'fast-track' solutions. The level of complexity, uncertainty and novelty that surrounds many climate issues also increases the risk of corruption. Moreover, key concepts, such as what should count as a forest, or how to establish additionality, are still being debated. The overarching message is that a dramatic strengthening of governance mechanisms can reduce corruption risk and make climate change policy more effective and successful. The quality of climate governance will help determine how well it addresses inherent corruption risks.