Recent U.S. Government mandates and a surge of worldwide concern for environmental and natural resource management have created a demand for training programs in these subjects. Several U.S. institutions now offer training programs in various aspects of environmental protection, including forestry; agriculture; biological sciences; sociology; environmental science and engineering; ecology; agronomy; natural resource planning; urban planning; and sanitary engineering, health, and facilities design. This directory provides a selected listing and brief description of courses in these subject areas offered by U.S. universities, government agencies and departments, and private associations. University entries are listed alphabetically by state and name of institution. Pertinent program information follows, including institution address; name of course, program, and college or school; name of dean; degree granted; brief description of program content; admission information; types of English-language training available; number of foreign students enrolled; and areas of concentration in which Man and the Biosphere projects are particularly concerned. The latter include tropical and temperate forests; grazing lands; arid zones; fresh waters, mountains, and islands; biosphere reserves; pesticides and fertilizers; engineering works; urban ecosystems; demographic change; perception of environmental quality; and pollution. U.S. Government and private association training programs are listed with a brief description, respectively, of course content and participants, and of workshop, conference, or meeting content. The directory concludes with tables in matrix form ranking the institutions and their programs by degree of difficulty from most difficult to noncompetitive. Production of this directory was assisted substantially by the U.S. National Committee of UNESCO's Man and the Biosphere Program, government agency training personnel, and use of computer data bases and several college and university catalogues. Its use is intended for A.I.D. Mission personnel, foreign nationals, and others concerned with balancing the conflicting needs of development and environmental preservation.