Nicolás García Uriburu's Coloration of Weser River in Bremen, 2011, was a poignant geographical choice in his series of environmental interventions. The Weser River holds particular significance as a major industrial waterway in northern Germany, serving as a lifeline for Bremen's bustling port and industrial sector. Uriburu's decision to dye its waters green with Fluorescein was a provocative statement on the intersection of industrial activity and environmental stewardship in a region synonymous with economic growth and shipping commerce.

Unlike his earlier interventions in more iconic and tourist-centric locations, such as Venice and Paris, Uriburu's action in Bremen directly confronted the environmental challenges of an industrialized urban environment. By transforming the Weser River into an artistic spectacle, he forced a confrontation of the environmental impact of industrialization on water quality and biodiversity, prompting reflection on sustainability and ecological balance in urban settings.

This intervention was significant not only for its environmental message but also for its accessibility to a non-art-specialized audience, intervening directly in the public space where people live and work. The importance of it being aimed for a non-art-specialized audience, intervening in the public space where people live, was paramount to its impact and to Uriburu’s practice at large.