Reviews some research on, and provides a mathematical model for, the decline in bacterial populations in a closed system as a consequence of accumulating toxins and decreasing food. (AL)

Describes some contributing factors to environmental crises and argues that the population of the United States will act to correct some of the causes of deterioration if they are provided with the facts by scientists and teachers. (AL)

Attitudes of biology teachers, prospective teachers, high school students, and adults were compared in regard to the basic principles of Zero Population Growth, the teaching of controversial topics, future state of the world, and Garret Hardin's Graduated Checklist of (28) Heresies." (CP)

Indicates the need for schools to present materials that will produce positive attitudes toward family planning. Proposes the development of a comprehensive sourcebook of material that will contain an overall theme with material planned for each grade level and each school subject. (DS)

Discusses computer simulation approach of Limits to Growth, in which interactions of five variables (population, pollution, resources, food per capita, and industrial output per capita) indicate status of the world. Reviews other books that predict future of the world. (CS)

Discusses the impact of world population growth leading to the establishment of the United Nations Fund for Population Activities and to the declaration of 1974 as World Population Year. Previews some of the parameters and interconnecting interests to be considered during this year of intensive population study. (JR)

Proposes a K-12 program to fill the need for population environment education. Lists six basic concepts that should be included in the program. (DS)

Describes changes to a traditional study of population in yeast colonies. Changes to the procedures include: (1) only one culture per student team; (2) cultures are inoculated only once; and (3) the same tube is sampled daily. (DDR)

Uses chaos theory to investigate the nonlinear phenomenon of population growth fluctuation. Illustrates the use of computers and computer programs to make calculations in a nonlinear difference equation system. (MDH)

Biology teachers can provide lessons for students to help them plan the future wisely. Three natural laws are emphasized as imperative to understanding how to plan wisely for restoring a balance in nature. (SA)

Described are awareness activities that deal with human population growth, resources, and the environment. Activities include simulations, mathematical exercises, and discussions of the topic. Specific examples of what individuals can do to help are listed. (KR)