A framework for dealing with the urban environment: introductory statement ; Pollution and enviromental quality ; The three- dimensional city: contained urban space ; Open (uncovered) space as a new urban resource ; Amenity resources for urban living ; Trans port: key to the future of cities ; The Value of urban land ; location, size and shape of cities as influenced by environmental factors the urban environment writ large ; Patterns of time and space use.

The quality of the environment in which people live, work, and play influences to no small degree the quality of life itself. The environment can be satisfying and attractive and provide scope for individual development or it can be poisonous, irritating, and stunting.

The papers in this volume are concerned with the urban environment-in which the majority of Americans live-or, more accurately, with the environment of urbanites, for the concern extends to outlying areas where urban dwellers visit and play.

The papers were initially prepared for a conference on the urban environment sponsored by Resources for the Future, Inc. The conference was organized to evaluate the current "state of the art" and to stimulate research in the field. Its main objective was to review (1) both the established concepts and those now evolving or needed to advance work in the field; (2) the existing sources of information and the new kinds of information which are required, particularly in measuring improvement or degradation of the environment; and (3) public policy issues related to environ mental improvement.