Present and future of modeling global environmental change : toward integrated modeling : a collection of contributions based on presentations at the 14th Toyota Conference, Mikkabi, Shizuoka, Japan, October 3 to 6, 2000 / edited by Taroh Matsuno, Hideji Kida / 松野太郎, 木田秀次, ToyotaConference(14th:2000:Mikkabi)