For Proms III at Kunsthallen Brandts Klædefabrik (Odense, Denmark), 1996 SUPERFLEX made an installation that included images from their research trip to Mozambique and Malawi. The research that later led to the development of the Supergas biogas system. In addition to the installation the museum toilets where tagged Biogas. Design by Henrik Kubel. The Biogas Tag was later among others used in a music video - The Tag.