Photosynthesis is a process on which virtually all life on Earth depends. To answer the basic questions, from molecules to ecosystems, and to establish correlations and interactions between these levels photosynthesis research, perhaps more than any other discipline in biology, requires a multidisciplinary approach. Congresses probably provide the only forums where progress throughout the whole field can be overviewed. The Congress proceedings give pictures of past advances in photosynthesis research and outline trends and perspectives, ranging from molecular events to aspects of photosynthesis on the global scale. The proceedings book, a set of 4 (or 5) volumes, is aimed at senior scientists in the field.