Portugese-language silent print. "An explanation of how nature produces topsoil from the basic raw materials of rock, water, air, and sunlight. The film emphasizes the necessity for an organized conservation program to save our natural reosurces. Includes animated drawings. For high school students and adult groups"--1948 Catalog of Copyright Entries.

Portuguese-language soundtrack. Part 2 of The Living Earth series. Shows the interdependence of plant and animal life and the consequences of man's misuse of natural resources. Includes animated drawings. For junior and senior high school grades and adult groups"-- Worldcat.

Portuguese-language silent print. "Presents the story of how our forests grow, describing the various elements that contribute to the mature forest. Explains forest zones in relation to temperature and rainfall and defines the phrase 'the climax forest' in terms of the speices that predominate when the forest is mature. For junior and senior high school and adult groups"--1949 Catalog of Copyright Entries.

Portuguese-language silent print. Title 2 in The Living Forest series, produced by the Conservation Foundation in association with the New York Zoological Society. Distributed by Encyclopedia Britannica Films.

Portuguese-language soundtrack. "Fossil remains and other prehistoric relics illustrate how continued life depends on an organism's ability to adapt itself to changes in its environment. The growth and development of the climax forest is shown in detail. For junior and senior high school and adult groups"--1951 Catalog of Copyright Entries.

Portuguese-language soundtrack. "Follows the chain of events when a strand is broken in the web of life. Shows a forest, destroyed by a windstorm, which eventually becomes a productive area as a grassland until again a strand is broken. Stresses that man's survival depends on his immediate use of the knowledge and science available to him if he is to survive"--Audio-Visual Catalog, U of Illinois at Urbana-Champaign, 1981.

Portuguese-language version. "Shows the role of topsoil, water, plants, forests, and animal life in the conservation of natural resources. Exposes the results of man's practice of taking too much from the earth in too short a time. Emphasizes the need for a system of orderly management of our natural resources"--Worldcat