This interim 2014 report by the Deep Decarbonization Pathway Project (DDPP) summarizes preliminary findings of the pathways developed by the DDPP Country Research Teams with the objective of achieving emission reductions consistent with limiting global warming to less than 2°C. The DDPP is a knowledge network comprising 15 Country Research Teams and several Partner Organizations who develop and share methods, assumptions, and findings related to deep decarbonization. Each DDPP Country Research Team develops illustrative pathway analysis for the transition to a low-carbon economy, with the intent of taking into account national socio-economic conditions, development aspirations, infrastructure stocks, resource endowments, and other relevant factors. The interim 2014 report focuses on technically feasible pathways to deep decarbonization.This executive summary starts with a short outline of key results from previous global studies (discussed in chapter I to IV) and then turns to what is new and special about the country-level approach of the DDPP (explained in chapter V). It summarizes the main preliminary findings from the Deep Decarbonization Pathways (DDPs) developed by the Country Research Teams (included in chapter VI) and draws some lessons for the international negotiations leading up to the 21st Conference of the Parties (COP-21) of the UN Framework Convention on Climate Change (UNFCCC) to be held in Paris in December 2015.