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Treasures of the Earth: Need, Greed, and a Sustainable Future BY SALEEM H. ALI xiii + 289 pp., 18 figs, ISBN 978 0 300 14161 0, New Haven, CT, USA and London, UK: Yale University Press, 2009

groundwater and subsurface waste disposal while Part four focuses on groundwater policy development and its economic analysis using neoclassical economics and other economic instruments. Part five is focused on groundwater use and management in the future with reference to sustainable development, transboundary and climate change considerations. The ecological capacity of groundwater systems, and their occurrence and usage, are analysed through macroeconomic models when regional or continental aspects are dealt with and through microeconomics in case of specific local situations. This treatment approaches the question of political decision for groundwater affairs again at two different levels, those dealing with large ecological and societal systems and those of more reduced size of special interest to local communities. It is worth mentioning that the author stresses in this context the need for additional research dealing with applied groundwater topics. Unfortunately economic aspects related to the need for stronger investments in groundwater research and protection of groundwater ecosystems are not dealt with. Another slight weakness of the book is the lack of discussion about economic aspects related to public education in perceptions of groundwater systems and exploitation of groundwater resources. These omissions do not diminish the value of the book, which is remarkable, reflecting the unusual interdisciplinary approach the author chosen, deviating from traditional economic texts to present complex problems associated with groundwater development, management and its sustainable use, analysing them using economic fundamentals. The book will be invaluable to economic analysts, improving evaluation of the complex and/or subtle groundwater issues, and make noneconomist engineers, hydrologists, hydrogeologists, environmental biologists and ecologists more familiar with economic fundamentals. Additionally to the book aids both planners and decision makers working on environmental conservation projects. The book makes a valuable contribution to groundwater science and we are confident that it will be widely used.