National Academy Press, ISBN 0-309-05127-4). The framework of the papers in this volume is based on the earth's geological record. The study of this record can help determine the possible impacts of past, present, and future global changes on the biosphere. The 14 papers in this volume were presented in 1989 at a symposium held by the Geological Society of America. Chapters include topics on oxygen and Proterozoic evolution, global change leading to biodiversity crisis in a greenhouse world,

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... s extinction, tropical climate stability, long-term climate change, and changes resulting from the last ice age.