Abstract
This paper analyses 490 televised news broadcasts featuring Brittany's "green algae" between 1986 and 2015. The problem has evolved over the past thirty years. It was first depicted as a hindrance to tourism due to urban pollution. It then was classified as an ecological disaster caused by agricultural productivism. Finally, it is currently considered a possible launch pad for sustainable development projects at the territorial level. The media have shaken up the region's political agenda and in so doing, they have hastened the reassessment of the "Breton agricultural model .