EarthDay Impromptu (1990) was an event organized collaboratively. It included artists Eduardo Kac, Carlos Fadon and Irene Faiguenboim (Chicago) and Bruce Breland of the DAX Group of Carnegie Mellon University in Pittsburgh, among other artists in different American cities and various countries (Australia, Austria, Brazil, Israel, Portugal, England, France and Canada). All participating artists worked together in an improvised ecological celebration. In EarthDay Impromptu, both fax and slow-scan television were used for the generation and exchange of images.