This project aims to assist Costa Rica in meeting reporting requirements under the UNFCCC Convention, in accordance with its commitments as a non-Annex 1 Party (as mandated by Article 4 and 12 of this Convention and COP 16 and 17 decisions), and to strengthen the technical and institutional capacity of Costa Rica to prepare and submit its Fourth National Communication (4NC) and Second Biennial Update Report (2BUR) to the UNFCCC. The project consists of the following key elements1.Review and update of the national circumstances and institutional arrangements 2.The Seventh National Greenhouse Gases Inventory (GHGI) report for the period 2014 – 20163.Assessment of sectors, actions and projects that could be included in the national emission reduction strategy 4.Completed vulnerability study including recommended adaptation measures for identified vulnerable sectors 5.Other information relevant for the preparation of 2BUR and 4NC 6.Second Biennial Update Report and Fourth National Communication consolidated and submitted to the UNFCCCThe 4NC/2BUR and their respective National Greenhouse Gas Inventories (NGHGI) will be the first built relying heavily on the SINAMECC platform to acquire and pre-process data and to carry out calculations for the NGHGI as well as provide information on mitigation activities and decarbonization pathways incorporating the TIMES-CR model.