This second volume of proceedings of the International Conference on Regional Science, Energy and Environment (Louvain, May 1975) contains papers related to general and partial equilibrium models of regional and urban development, in which natural and human resources playa dominant role. It need not be stressed that environmental factors and resource management have, to some extent, been neglected in postwar economic research. Unfortunately, a world-wide energy crisis or more local environmental disruptions were necessary to draw the economist's attention on the increasing imbalance between...