This text is an updated version of a previously published title Techniques in Bioproductivity and Photosynthesis , 2nd edition (Coombs et al) and, like its predecessor, has derived from UNEP-sponsored training courses which are internationally known and respected. It provides coverage of many measurement techniques of photosynthesis and relates them to the subject of global climate change, which is becoming of increasing concern. The editors, themselves of high international standing, have brought together an extremely eminent team of plant scientists, each of whom provides up-to-date information on a single important parameter of plant growth, the techniques employed in its measurement and a detailed review of the techniques themselves.