5 mai

Bilan écologique du Bois – Et si « L’ARBRE cachait LA FORÊT ? »…

Categorie: Harmonie 1

D’après ROMAN ALTONOFF, concepteur d’architectures industrielles « Le XXIème siècle sera une Société orientée vers le bois« . Découvrez ICI LE PLUS « ECO-LOGIQUE » DES MATERIAUX !

Le Terre possédant son atmosphère, les forêts en équilibre ne sont que des entrepôts de gaz carbonique grâce au processus de la photosynthèse : le gaz carbonique est emprisonné dans les cellules du bois, tandis que l’oxygène est relâché dans l’atmosphère.

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Tant que l’arbre va croître, le même processus se poursuivra. La « production » d’une tonne de Bois absorbe 1,5 tonne de gaz carbonique et rejette 1,1 tonne d’oxygène dans l’atmopshère. Au fur et à mesure que la croissance de l’arbre se ralentit, l’absorption de gaz carbonique diminue de même.

D’après une étude de l’Union Européenne (Projet Euroflux), un tiers des émissions de gaz carbonique en Europe est absorbé par les forêts de notre vieux Continent. Si depuis 1945, on avait construit en Grande Bretagne toutes les résidences en ossature Bois, on aurait évité que 300 millions de tonnes de CO2 soient rejetées dans l’atmosphère !

Plus on utilise le Bois, plus on luttre contre les émanations de gaz carbonique…! Mais attention : si l’arbre est arrivé à maturité, ou même si, trop âgé, il pourrit sur place : dans un cas, il n’y a plus d’absorption de gaz carbonique, et dans l’autre cas, il y a dégagement de gaz carbonique. DONC : IL FAUT RECOLTER LES ARBRES !

Rappelons que brûler le bois est « neutre » pour le gaz carbonique. Le bois nécessite PEU d’énergie pour être récolté, contrairement à l’extraction des autres énergies d’origine fossile. Le bois est une source d’énergie RENOUVELABLE.

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