The EU has set a target to reduce the reducing greenhouse gas emissions by 80-95% in 2050 in comparison to 1990. To implement this roadmap it is necessary to develop the world capacity of using renewable energy. This roadmap can't be implemented without driving the energy market toward 100% renewable and sustainable energy. Connolly et al. [1] have studied the scenario for a 100% renewable energy system in Europe by the year 2050. The transition from a business-as-usual situation in 2050, to a 100% renewable energy Europe has been analysed and discussed. Thellufsen and Lund [2] looked at the transition towards a 100% renewable energy system, it was concluded that energy savings are essential and should be obtained from all types of energy consumption, such as, heating, electricity sectors, industry, and transport. This editorial presents the different talk and concepts presented at SEEP2014 in Dubai, the conference discussed the recent developments on sustainable energy and environment. One of the keynote presented the concept of Energy Quadrilemma versus Energy Trilemma, it can be seen the strong emphasis on the four different areas (Cost, Environment, Security and Job Opportunities) supporting the movement toward 100% renewable energy, Fig. 1 summarize both concepts. (C) 2016 Elsevier Ltd. All rights reserved.