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Ib Johnsen is Associate Professor at Institute of Plant Ecology, University of Copenhagen and Honorary Professor at Department for Environment, Technology and Social Studies, Roskilde University
Effects of air pollutants on plant species and terrestrial ecosystems; Biological indication and monitoring of ambient air quality; Impact on arctic ecosystems of elevated UV-B radiation due to depletion of stratospheric ozone; Consequences for terrestrial plant life of global climate change (Greenhouse effect, Ozone depletion etc.) in combination with traditional air pollution scenarios; Cultivation aspects and ecological benefits of reduced pesticide application in Danish agriculture (and forestry).
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