The objective of this report is to increase the knowledge base regarding the effectiveness of EbA by collecting evidence from the field. The understanding of economic costs and benefits of ecosystems based approaches will provide additional important information to assist decision making at the local, national and global levels, and to influence policy. While uncertainties and challenges may still remain, robust and appropriately designed valuation methodologies can help to decrease them. Detailed assessments of cost and benefits (using any of the methodologies described) must be undertaken, of ongoing and completed projects, in order to decrease the existing knowledge gaps and to show policy makers why they should invest in EbA. In order to contribute to policy through improved decision making at the national level, two case studies are highlighted in this report that look at the costs and benefits of EbA in the Philippines.
