This article defines some troublesome facts about the use of energy, organizes the major issues, reviews some alternative sources of energy, provides ideas for classroom use, and lists references and materials on the subject. (RC)

The effect that pesticides can have on natural ecosystems is discussed. Specific examples are drawn from microbial ecosystems in estuarine regions. (DT)

This booklet presents a unified perspective of natural and human systems. The problems of contemporary civilization are analyzed in terms of the interrelationships among energy, food, evolution, population, community, interactions, and balance. The authors' philosophy emphasizes that all life depends on the balance between natural systems and…

Discusses the relationship of adaptation to natural selection. Since natural selection does not always lead to adaptation, defining adaptation is sometimes a difficult task. (MA)

There are numerous bird species that will nest only in dead or dying trees. Current forestry practices include clearing forests of these snags, or dead trees. This practice is driving many species out of the forests. An illustrated example of bird succession in and on a tree is given. (MA)

Discussed is the biological succession of a lake beach to a hardwood climax forest. The narrative is illustrated with numerous full color photographs. (MA)

Article tells how a visit to a game refuge inspired students to create songs about their experience. (GB)

Presents the history of the buffalo's demise and reemergence in the United States and Canada. Discusses the problems facing herds today caused by a small genetic pool, disease, range concerns, lack of predation, and culling. Points out the benefits of buffalo raising as compared to cattle raising, including the marketing advantages. (MCO)

Contends that ecosystemic therapy can be approached from two epistemological perspectives, each providing different way of thinking about nature of human systems, way problems develop, and means by which mental health counselor understands and works within systems. Presents case illustrating different "thought" rules and actions underlying these…

Reacts to previous article in which Becvar and Becvar contend that ecosystemic model represents counter-cultural movement in mental health field. Reviews each of the concepts presented by Becvar and Becvar, concluding that many effective counselors already function in a manner consistent with the ecosystemic model presented. (NB)

Finds that ecological and moralistic attitudes toward the environment correlate with talking about the environment at home, watching nature films, and reading about the environment. (Author/CCM)

The First International Symposium on Acid Precipitation and the Forest Ecosystem dealt with the potential magnitude of the global effects of acid precipitation on aquatic ecosystems, forest soils, and forest vegetation. The problem is discussed in the light of atmospheric chemistry, transport, and precipitation. (Author/BT)