This book presents essential learning approaches. It introduces educational and training activities, as well as various innovative methods aiming at the development of practical skills, in order to strengthen the continuous process of environmental education, and in particular the education for sustainable development (ESD). In doing so, it focuses on three dimensions (social, economic and environmental) as a means of achieving an effective change of behaviour and "tries to bridge the gap between science and environmental education by describing a set of projects, initiatives and field activities". A special emphasis is put on teacher training programmes, conception, and implementation, highlighting the problems and barriers, which prevent development as far as integration of sustainability issues in higher education is concerned.