On view in Paris, two installations about climate change by Argentinean artists. One of them, Where the tides ebb and flow by Pedro Marzorati—who is based in Paris—is ephemeral in nature and comprises 31 electric-blue sculptures, arranged in a semi-circle on a 150m surface on the Montsouris Park lake. The sculptures represent busts of men and women partially or entirely submerged, an allusion to the rise of coastal waters and the looming threat it entails for a large number of people. The second work is permanent and was created for the Nuit Blanche 2015: a monumental installation by Leandro Erlich (1973), financed by the city of Paris as part of the project Les oeuvres d'art investissent la rue (Art Floods the Streets). This was not the first time that Erlich participated in the Nuit Blanche; he was in Paris for the 2004 edition with Bâtiment (Building), an installation where a large mirror, placed at an angle, reflected a Haussmann-style façade designed on the ground, an interactive and playful work that visitors could climb. Climate change threatens human existence and nature; architecture, symbol of civilizations, is also in danger. To evoke this danger, Erlich chose a strong image: a small Parisian building melting under the effects of global warming. At once direct and humorous, this work—whose title, Maison fond (Melted House) was decided on the basis of its phonetic correspondence with Mes enfants (My Children)—invites us to question our certainties, a few weeks ahead of the international climate change conference to be held in Paris this December. The small building, which, like the Tower of Pisa but for different reasons, leans to one side, is located in a public space constantly traversed by pedestrians going into or coming out of one of Europe's most heavily used train stations, Gare du Nord. In a region of France with no seismic activity, the house dissolving on the ground attracts and intrigues passers-by. Erlich's spatial illusions have always enchanted us with their distortions of our perception of reality; this new permanent installation prompts a deeper consideration of the future of our planet.