This is the first scientific report on the examination of the lunar samples returned from the Apollo 12 mission. Analyses of 34 kilograms of lunar rocks and fines reveal significant differences from the samples from Tranquillity Base, most notably in age, texture, amount of solar wind material, and in mineral and chemical composition. (LC)

Discusses the key sites chosen in the United States for environmental research and monitoring as part of an international program that protects major centers for ecological and environmental research. (MLH)