Presented are perspectives on the emergence of environmental problems. Six major trends in scientific thinking are identified including: holistic approaches to examining environments, life support systems, resource management, risk assessment, streamlined methods for monitoring environmental change, and emphasis on the global framework. (Author/SA)

Charges that the "impact statements" used to evaluate environmental conditions often serve political ends and often are not well-planned or scientifically valid. (MLH)

Discusses the children of Aldo Leopold, their contributions to science and environmental conservation, and the influence of their father's ideas on their lives. (SA)

Described is a study in which energy demands were analyzed and several plausable future energy scenarios were developed. The article attempts to illustrate the dynamics of energy demand and supply in the United States in order to aid future planning. (MDR)

Brazil's energy options and current outlook are examined, and a summary of known reserves of fossil and renewable energy resources is given. Suggestions for an energy program designed to preserve Brazilian culture are included. (MDR)