Johnny A. Johannessen Nansen Environmental and Remote Sensing Center, Norway

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The past decade has seen increasing public concern about the Earth, its environment and mankind´s impact upon it. Global threats such as climate warming, stratospheric ozone depletion, tropospheric pollution, reduction in Arctic sea ice extent and more recent regional events such as the very intense 1997-1998 El Nino, the fires in S.E. Asia and the floods in Middle Europe, have left the public more concerned about the need to understand, monitor; and predict the evolution and changes of the Earth´s environment.

The past decade has seen increasing public concern about the Earth, its environment and mankind´s impact upon it. Global threats such as climate warming, stratospheric ozone depletion, tropospheric pollution, reduction in Arctic sea ice extent and more recent regional events such as the very intense 1997-1998 El Nino, the fires in S.E. Asia and the floods in Middle Europe, have left the public more concerned about the need to understand, monitor; and predict the evolution and changes of the Earth´s environment.