From May 29 up to June 4th, it will be the Sustainable Development Week (see http://info.france2.fr/france/21541929-fr.php).

Le d?velopement durable c'est "Une mani?re d'inciter citoyens, collectivit?s et entreprises ? changer leurs habitudes pour m?nager la plan?te et le climat. Le concept, issu du Sommet de la Terre ? Rio en 1992, semble mieux connu du grand public: il s'agit de combiner croissance ?conomique, progr?s social et pr?servation de l'environnement. " See http://en.wikipedia.org/wiki/Sustainable_development

Sustainable Development will be at the heart of the leader's issues of this century. Therefore I believe it's important to think about it. Many other think so, by the way. Today in l'Echo there was an article on special houses wich work like a "thermos" and which allow substantial energy cost savings in Germany.