International design office Carlo Ratti Associati (CRA) and Bouygues Immobilier have revealed designs for ILOW (pronounced ee-low), an experimental and sustainably minded building that aims to bridge two different socio-economic neighborhoods near Paris. Proposed for the commune of Nanterre, the project would be located between La Défense — the financial powerhouse for Paris that’s also Europe’s largest business district — and a neighborhood home to Tours Nuages (Cloud Towers), a pioneering post-war social housing project designed by architect Émile Aillaud.