Several UN entities have issued a Blueprint for Ocean and Coastal Sustainability, which highlights the role of oceans in sustainable development and offers recommendations ahead of the UN Conference on Sustainable Development (UNCSD, or Rio+20). This Blueprint provides an overview of the threats faced by the oceans, including unsustainable use, deforestation of mangroves, disappearance of coral reefs, ocean acidification and climate change. It further highlights the role of oceans in regulating the climate, contributing to food security and sustaining livelihoods.