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By Wilson E. B., Hilferty M. M.

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What are the overall consequences to fish health? How do the toxins interact with other microorganisms and with pollutants to hurt fish, wildlife and humans? For many species of harmful algae, the factors that stimulate increased activity are as incompletely understood as the organisms’ life cycles. Clearly, nutri- ent pollution has stimulated the growth of Pfiesteria and certain other members of the group. Some ecologists believe that nutrient overenrichment and other types of pollution have contributed to a serious general imbalance in many aquatic ecosystems.

I hope that this vision, embodied in Oxygen and other systems like it, will help us break away from our 40-year machine preoccupation to a new era of people-oriented computing. And as we focus our technologies increasingly on human needs, perhaps we can make a bigger wish for the future. The first three socioeconomic revolutions were all based on things— the plow for the agrarian revolution, the motor for the industrial revolution and the computer for the information revolution. Perhaps the time has come for the world to consider a fourth revolution, aimed no longer at objects but at understanding the most precious resource on earth— ourselves.

Chronic Effects in the Field P eople exposed to toxic Pfiesteria outbreaks in nature have reported similar symptoms. Divers, fishermen and others working in contaminated waters while fish were showing signs of Pfieste- Scientific American August 1999 Copyright 1999 Scientific American, Inc. 47 ria poisoning have described respiratory problems, headaches, extreme mood swings, aching joints and muscles, disorientation, and memory loss. Such anecdotal reports have recently been bolstered by formal clinical assessments.

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