This document presents a synthesis report on the aggregate effect of the 119 intended nationally determined contributions (INDCs) communicated by 147 Parties by 1 October 2015. It provides estimates of the aggregate greenhouse gas emission levels in 2025 and 2030 resulting from the implementation of those INDCs. Those levels are compared with the emission levels in 1990, 2000 and 2010 as well as with emission trajectories consistent with: action communicated by Parties for the pre-2020 period, and holding the average global temperature rise below 2 °C above pre-industrial levels. This report identifies and discusses trends that indicate opportunities for enhanced action to address climate change in the longer term. In addition, it synthesizes information relating to the adaptation component of the INDCs communicated by 100 Parties.