1967-now on: "Organisations d'espaces"

In the Organisations d'espaces, the artist utilizes larger and more specialized mediums with each new work (parts of industrial cranes, scaffolding, tree plantings, video projection, the dropping of blocks of ice by helicopter, the setting off of avalanches) to either reveal or correct the hidden meaning of each selected space. The spaces themselves vary from a museum gallery to a construction site to a valley, and in each case the project is presented with the aid of a map.

In the utopic project concerning the Seine Valley, the installation of apparatus able to warn people in cities when pollution levels are high was proposed (in a town like Paris, this was finally done, but only twenty years later). The creation of "permanent information centers" was also proposed, in which any kind of information would have been available at any time, with the possibility for anyone to give his opinion, to express his ideas on any subject (this is a rather fair description of how the Web now looks like).