Introduction : Understanding and solving environmental problems in the 21st century : toward a new, integrated "hard problem science" / R. Costanza and S.E. Jørgensen -- Integrated assessment and modeling -- science for sustainability / G. Harris -- The potential for integrated assessment and modeling to solve environmental problems : vision, capacity, and direction / P. Parker [and others] -- Complex adaptive hierarchical systems / B.C. Patten [and others] -- Complex adaptive hierarchical systems / B.C. Patten [and others] -- Ecosystem services, their use and the role of ecological engineering : state of the art / A. Dakers -- Ecosystem services / B. Guterstam [and others] -- Science and decisionmaking / V.H. Dale -- Science and decisionmaking / E.J. Rykiel Jr. [and others] -- Ecosystem health and human health / L. Vasseur, D.J. Rapport, J. Hounsell -- Ecosystem health and human health : healthy planet, healthy living / L. Vasseur [and others] -- Quality of life and the distribution of wealth and resources / R. Costanza, J. Farley and P. Templet -- Quality of life and the distribution of wealth and resources / J. Farley [and others].