This major authoritative collection prepared by leading figures from North America and Europe presents a careful selection of the most important published articles and papers on ecological economics. Ecology and economics have developed as separate disciplines throughout their recent histories in the twentieth century. A signal contribution of this important collection is that it brings these different traditions together and successfully integrates the natural and social sciences in a volume that will be indispensable to anyone interested in ecological economics. This unique volume contains both classics in the field and contemporary research and gives a coherent picture of the development of the major threads in ecological economics. This collection is a "sampler" in the transdiciplinary field of ecological economics which paints a coherent picture of the development of some of the major threads in this new endeavour. It consists of a selection of both classics in the field and contemporary research, and is intended both for formal courses in ecological economics and for interested independent readers. The book contains 43 papers divided into six sections: 1. Historical Roots and Motivations; 2.Basic Organizing Principles of Ecological Economics; 3.Material and Energy Flows in Ecological and Economic Systems: Theory and Applications; 4.Accounting for Natural Capital, Ecological Limits, and Sustainable Scale; 5.Valuation of Ecological Services; and 6.Integrated Ecological Economic Modeling and Assessment.