The International Conference on Technologies and Materials for Renewable Energy, Environment and Sustainability (TMREES15) organized by the Euro-Mediterranean Institute for Sustainable Development (EUMISD) will be held in April 17-20, 2015 in Beirut, Lebanon. TMREES15 has a main objective to promote sustainable, healthy and diverse ecosystems; encourage and support the national energy security systems through development of green-based and other renewable resources and processes, bringing together participants from international research centers, universities, industry and administrative organizations around the world to exchange innovative and novel ideas, explore enabling technologies, share field trial experiences in sustainability issues and to open a new window on the circumstances of the classical energy sources and their harmful impact on the society.