J. ENVIRONMENTAL SYSTEMS, Vol. 28(4) 279-291, 2000-2001 DEVELOPMENT OF A DYNAMIC AND PREDICTIVE MODEL FOR ECOLOGICAL FOOTPRINTING (EF) J. S. PANDEY S. KHAN V. JOSEPH R. N. SINGH National Environmental Engineering Research Institute (NEERI) Nagpur, India ABSTRACT Although a very useful tool, Ecological Footprint (EF) analysis has recently been subject to quite a bit of criticism. One of the most important weak- nesses that EF suffers from is the fact that it is not a dynamic EF-model. An attempt has, therefore, been made in this article to develop a suitable dynamic EF-model. The dynamic EF-model, thus developed, can be used also for future predictions. A condition for future sustainability has also been derived and tested. Although the model development and analyses have been carried out for the rice-component only, they can likewise be extended for various other components. INTRODUCTION The premises on which the EF concept is based can be summarized as follows [1-2]: a) Every individual, process, activity, and region has an impact on the Earth. And these impacts (due to resource use and waste-generation) can be quantified in terms of biologically productive area. 279 Ó 2001, Baywood Publishing Co., Inc.