The Third Landscape
Gilles Clément, in his Manifesto of the Third Landscape, defines the “third landscape” as
“the sum of the space left over by man to landscape evolution – to nature alone. […] This can be considered as the genetic reservoir of the planet, the space of the future..”
Included in this category are left behind (délaissé) urban or rural sites, transitional spaces, neglected land (friches), swamps, moors, peat bogs, but also roadsides, shores, railroad embankments, etc. To these unattended areas can be added space set aside , reserves in themselves: inaccessible places, mountain summits, non-cultivatable areas, deserts; institutional reserves: national parks, regional parks, nature reserves...
Viewing the Third Landscape as a biological necessity, conditioning the future of living things, modifies the interpretation of territory and enhances areas usually looked upon as negligible. It is up to the political body to organize ground division in such a manner as to assume responsibility for these undetermined areas, tantamount to concern for the future.