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Discusses questions surrounding origins of the manufacture and use of bark paper in Mesoamerica as part of a series of articles that explore recent findings and interpretations concerning the rise and fall of the ancient Maya civilization. Evidence found on pottery and on manuscript volumes called codices; Parallels to Asian artifacts; Possible link; Possible conclusions to research; Details.

Discusses the need for recycling, which yields back much of the energy invested in materials. Percentage of energy that recycling aluminum, steel, and paper saves; How recycling protects the environment; Reverse vending machine, which has helped bring improvements to aluminum recycling; Rank of countries according to their recycling habits.