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EcoHealth (also referred to as Health Ecology) is an emerging field of study researching how changes in the earth’s ecosystems affect human health. It has many prospects. EcoHealth examines changes in the biological, physical, social and economic environments and relates these changes to human health. Examples of these changes and their effects abound. Common examples include increases in asthma rates due to air pollution, PCB contamination of game fish in the Great Lakes of the United States , and habitat fragmentation leading to increasing rates of Lyme disease. Recently virulent new infectious diseases such as SARS, Ebola virus, Nipah virus, bird flu and hantavirus have all been found to result from ecosystem change created by humans. These diseases have high death rates and very few effective therapies. EcoHealth is bringing together physicians, veterinarians, ecologists, life scientists, social scientists, agricultural scientists, landscape and urban planners, and others to study how ecosystem changes affect human health. EcoHealth strives to provide innovative, practical solutions to reduce or reverse the negative health effects of ecosystem change, and to use the salutogenic effects of functional ecosystems to improve public health.