{"id":9587,"date":"2023-04-20T09:09:08","date_gmt":"2023-04-20T07:09:08","guid":{"rendered":"https:\/\/sceaux-lagazette.fr\/?p=9587"},"modified":"2023-04-20T09:09:09","modified_gmt":"2023-04-20T07:09:09","slug":"bilan-carbone-marie-curie","status":"publish","type":"post","link":"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/20\/bilan-carbone-marie-curie\/","title":{"rendered":"Bilan Carbone Marie-Curie"},"content":{"rendered":"\n<p>Le 7 avril, 29 \u00e9l\u00e8ves de Terminale TG9 du lyc\u00e9e Marie-Curie de Sceaux pr\u00e9sentaient le bilan carbone de la cit\u00e9 scolaire, qu\u2019ils avaient r\u00e9alis\u00e9 les mois pr\u00e9c\u00e9dents. Ils ont \u00e9valu\u00e9 les \u00e9missions de GES (gaz \u00e0 effet de serre) provenant de diff\u00e9rents domaines et ont imagin\u00e9 des solutions possibles. Le proviseur, les 6 professeurs pr\u00e9sents et deux repr\u00e9sentants de l\u2019association ZEN 2050 Maintenant ont manifestement appr\u00e9ci\u00e9 le travail.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e9thodes de travail<\/h2>\n\n\n\n<p>R\u00e9partis en groupes de 4 ou 5, les \u00e9l\u00e8ves ont \u00e9tudi\u00e9 les six domaines d\u2019\u00e9mission de GES&nbsp;: \u00e9nergie, transports, alimentation, biens informatiques, biens consommables. &nbsp;Chaque domaine a \u00e9t\u00e9 \u00e9tudi\u00e9 par une \u00e9quipe d\u00e9di\u00e9e, tandis qu\u2019une \u00e9quipe synth\u00e8se \u00e9tait charg\u00e9e d\u2019harmoniser l\u2019ensemble de l\u2019\u00e9tude et sa pr\u00e9sentation.<\/p>\n\n\n\n<p>D\u2019un point de vue m\u00e9thodologique, les \u00e9l\u00e8ves se sont appuy\u00e9s sur des outils con\u00e7us par l\u2019association <a href=\"https:\/\/educlimat.fr\/\" target=\"_blank\" rel=\"noreferrer noopener\">EduClimat<\/a> auquel <a href=\"https:\/\/zen2050maintenant.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">ZEN2050<\/a> les avait form\u00e9s. L\u2019administration (en particulier l\u2019\u00e9quipe d\u2019intendance) leur a fourni les nombreuses donn\u00e9es dont ils avaient besoin, qu\u2019ils ont associ\u00e9es avec des donn\u00e9es de l<a href=\"https:\/\/www.ademe.fr\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u2019Ademe<\/a>.<\/p>\n\n\n\n<p>Un sondage a \u00e9t\u00e9 r\u00e9alis\u00e9 pour connaitre les moyens utilis\u00e9s pour venir \u00e0 la cit\u00e9 scolaire et en repartir. 67% des \u00e9l\u00e8ves et 72% des professeurs ont r\u00e9pondu, ce qui repr\u00e9sente une proportion suffisamment importante pour que les r\u00e9sultats soient jug\u00e9s repr\u00e9sentatifs.<\/p>\n\n\n\n<p>La classe a transform\u00e9 un jeu de cartes d\u2019\u00c9duClimat en utilisant les donn\u00e9es trouv\u00e9es pour la cit\u00e9 scolaire.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les pr\u00e9sentations<\/h2>\n\n\n\n<p>Les r\u00e9sultats \u00e9taient projet\u00e9s dans la salle, les orateurs avaient un micro et le tout \u00e9tait tr\u00e8s professionnel. Les \u00e9quipes s\u2019\u00e9taient organis\u00e9es pour que tous leurs membres s\u2019expriment. Comme l\u2019a fait remarquer le proviseur, une excellente pr\u00e9paration pour l\u2019\u00e9preuve de grand oral&nbsp;du bac !<\/p>\n\n\n\n<p>L\u2019\u00e9quipe de synth\u00e8se a d\u2019abord rappel\u00e9 ce qu\u2019est le r\u00e9chauffement climatique et son origine anthropique. Elle a rappel\u00e9 le r\u00f4le de gaz \u00e0 effet de serre du gaz carbonique (CO2) et le principe consistant \u00e0 calculer la masse de CO2 \u00e9mise. Elle a pr\u00e9cis\u00e9 le p\u00e9rim\u00e8tre de l\u2019\u00e9tude&nbsp;: 1864 \u00e9l\u00e8ves et 137 professeurs, dans leurs activit\u00e9s li\u00e9es \u00e0 Marie-Curie ainsi que les actions faites par Marie-Curie pour les accueillir. Le tout a \u00e9t\u00e9 r\u00e9parti par domaines.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les r\u00e9sultats<\/h2>\n\n\n\n<p>Le total des \u00e9missions annuelles a \u00e9t\u00e9 \u00e9valu\u00e9 \u00e0 1160 tonnes. La moiti\u00e9 provient de l\u2019\u00e9nergie&nbsp;: 37 tonnes pour l\u2019\u00e9lectricit\u00e9 (peu carbon\u00e9e en France) et 532 tonnes pour le gaz (utilis\u00e9 pour le chauffage).<\/p>\n\n\n\n<p>Le deuxi\u00e8me poste contributeur est l\u2019alimentation, avec 220 tonnes, dont 45 % pour le seul repas hebdomadaire avec de la viande rouge. Il faut noter que sur 5 repas hebdomadaires, 1 est avec viande rouge et 1 est v\u00e9g\u00e9tarien. Les 3 autres offrent de la viande blanche ou du poisson.<\/p>\n\n\n\n<p>Le troisi\u00e8me poste est celui des transports pour venir et partir. Avec 200 tonnes (soit 18% environ du total) il est assez proche du deuxi\u00e8me. Les \u00e9missions sont importantes pour ceux qui viennent en bus ou en voiture. Les enseignants ont en moyenne plus d\u2019\u00e9missions car ils habitent plus loin.<\/p>\n\n\n\n<p>Les \u00e9l\u00e8ves ont consacr\u00e9 un poste particulier aux voyages scolaires, l\u2019<a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/03\/45-lyceens-a-cracovie\/\" target=\"_blank\" rel=\"noreferrer noopener\">un en Pologne<\/a>, l\u2019autre en Espagne. Ces voyages n\u2019ont concern\u00e9 que quelques dizaines d\u2019\u00e9l\u00e8ves chacun, mais avec un bilan assez \u00e9lev\u00e9 du fait de l\u2019utilisation de l\u2019avion. Les produits \u00e9mis se montent en effet \u00e0 58 tonnes, soit 5% du total.<\/p>\n\n\n\n<p>L\u2019analyse des biens informatiques a permis de pointer le bilan carbone des ordinateurs offerts par la r\u00e9gion aux \u00e9l\u00e8ves de seconde. &nbsp;Les biens consommables ne repr\u00e9senteraient pour leur part que 8 tonnes. Dont une partie notable vient du papier utilis\u00e9 pour les polycopi\u00e9s.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les incertitudes<\/h2>\n\n\n\n<p>Chaque groupe s\u2019est interrog\u00e9 sur les limites de son analyse et sur la fiabilit\u00e9 des r\u00e9sultats. Cela a \u00e9t\u00e9 particuli\u00e8rement le cas de celui s\u2019appuyant sur un sondage qui a questionn\u00e9 sa repr\u00e9sentativit\u00e9. D\u2019autres se sont inqui\u00e9t\u00e9 des incertitudes li\u00e9es \u00e0 leur m\u00e9thode.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les pistes de solution<\/h2>\n\n\n\n<p>Chaque groupe a tent\u00e9 de trouver des moyens de r\u00e9duire les \u00e9missions mises en \u00e9vidence. La m\u00e9thode de pr\u00e9sentation conduisait \u00e0 les identifier par domaines, le parti-pris ci-dessous est de les regrouper par type de levier utilis\u00e9.<\/p>\n\n\n\n<p><strong>Efficacit\u00e9 \u00e9nerg\u00e9tique<\/strong><\/p>\n\n\n\n<p>Il s\u2019agit ici d\u2019am\u00e9liorer le processus pour consommer moins d\u2019\u00e9nergie (ou de biens). Le covoiturage en est un exemple. Un autre est d\u2019envoyer les polycopi\u00e9s par mail plut\u00f4t que de les imprimer&nbsp;: les \u00e9l\u00e8ves ont l\u2019habitude de lire sur \u00e9cran.<\/p>\n\n\n\n<p>&nbsp;Concernant les ordinateurs offerts par la r\u00e9gion&nbsp;: est-ce n\u00e9cessaire pour ceux qui en ont d\u00e9j\u00e0 un, ont demand\u00e9 les \u00e9l\u00e8ves ? La discussion apr\u00e8s la pr\u00e9sentation semble indiquer qu\u2019ils reprochent surtout \u00e0 ces ordinateurs leur mauvais fonctionnement.<\/p>\n\n\n\n<p>Une meilleure isolation des b\u00e2timents serait \u00e9galement une solution utile. Les \u00e9l\u00e8ves ont compris que le classement en monument historique ne laisse gu\u00e8re de marge de man\u0153uvre dans ce domaine.<\/p>\n\n\n\n<p>L\u2019id\u00e9e d\u2019augmenter la taille du parking \u00e0 v\u00e9lo peut \u00eatre rang\u00e9e dans cette cat\u00e9gorie si on fait l\u2019hypoth\u00e8se que cela l\u00e8verait un frein \u00e0 l\u2019utilisation du v\u00e9lo.<\/p>\n\n\n\n<p>Enfin, le groupe alimentation a not\u00e9 qu\u2019une solution efficace serait de limiter les d\u00e9chets alimentaires.<\/p>\n\n\n\n<p><strong>Substitution<\/strong><\/p>\n\n\n\n<p>Le principe consiste \u00e0 modifier la source d\u2019\u00e9nergie utilis\u00e9e pour une moins carbon\u00e9e. Ici, il s\u2019agirait d\u2019utiliser la g\u00e9othermie pour chauffer les b\u00e2timents plut\u00f4t que le gaz. Comme l\u2019ont signal\u00e9 les \u00e9l\u00e8ves, une \u00e9tude<a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2022\/10\/28\/geothermie-demain-a-fontenay-sceaux-et-bourg-la-reine\/\" target=\"_blank\" rel=\"noreferrer noopener\"> est en cours<\/a> sur le p\u00e9rim\u00e8tre Fontenay-aux-Roses, Sceaux et Bourg-la-Reine. Le calcul montre que cela pourrait aboutir \u00e0 une \u00e9conomie de 440 tonnes, soit presque 40 % du total\u00a0!<\/p>\n\n\n\n<p>L\u2019\u00e9lectrification des bus ou des voitures proc\u00e9derait du m\u00eame levier, mais cette solution n\u2019a pas \u00e9t\u00e9 propos\u00e9e. Il est vrai que cela sortait assez clairement de leur p\u00e9rim\u00e8tre.<\/p>\n\n\n\n<p><strong>Sobri\u00e9t\u00e9<\/strong><\/p>\n\n\n\n<p>Le principe consiste \u00e0 adopter une solution r\u00e9pondant moins bien aux divers objectifs de l\u2019utilisateur. La proposition d\u2019utiliser le train ou le bus plut\u00f4t que l\u2019avion pour les voyages scolaires entre dans cette cat\u00e9gorie. De m\u00eame pour l\u2019alimentation o\u00f9 la proposition a \u00e9t\u00e9 faite d\u2019augmenter le nombre de repas v\u00e9g\u00e9tariens, voire de supprimer la viande rouge &nbsp;ou pour l\u2019utilisation du v\u00e9lo \u00e0 la place de l\u2019auto ou du bus.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le r\u00f4le des enseignantes<\/h2>\n\n\n\n<p>Ce travail de qualit\u00e9 n\u2019a pu avoir lieu que gr\u00e2ce \u00e0 l\u2019initiative puis \u00e0 l\u2019appui de St\u00e9phanie Moisson (professeure de physique) et Sarah Ostorero (professeure de SVT).<\/p>\n\n\n\n<p>Une premi\u00e8re pr\u00e9sentation <a href=\"http:\/\/www.lyc-mariecurie-sceaux.ac-versailles.fr\/2023\/04\/14\/bilan-carbone-de-la-cite-scolaire-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">a eu lieu le 14 avril<\/a> aupr\u00e8s de 30 \u00e9cod\u00e9l\u00e8gues du lyc\u00e9e. Les \u00e9cod\u00e9l\u00e9gu\u00e9s, ont pu dresser un&nbsp; bilan carbone simplifi\u00e9 de Marie Curie gr\u00e2ce au jeu confectionn\u00e9 par les \u00e9l\u00e8ves. Puis le diaporama plus d\u00e9taill\u00e9 des diff\u00e9rents p\u00f4les \u00e9tudi\u00e9s leur a \u00e9t\u00e9 pr\u00e9sent\u00e9&nbsp;; un lien <a href=\"http:\/\/www.lyc-mariecurie-sceaux.ac-versailles.fr\/wp-content\/uploads\/sites\/256\/2023\/04\/Power-Point-Synthese-Bilan-Carbone-version-07-avril-.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">vers ce diaporama<\/a> se trouve sur le site de la cit\u00e9 scolaire Marie -Curie.<\/p>\n\n\n\n<p>Une nouvelle pr\u00e9sentation sous forme de panneaux sera faite lors du Printemps des transitions le vendredi 12 mai apr\u00e8s-midi et le 13 mai matin au parc de la M\u00e9nagerie.<\/p>\n\n\n\n<p>Publications r\u00e9centes de la Gazette \u00e0 propos de Marie-Curie<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/03\/02\/marie-curie-au-temps-des-jeunes-filles\/\" target=\"_blank\" rel=\"noreferrer noopener\">Marie-Curie au temps des jeunes filles<\/a><\/li><li><a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/03\/14\/protestation-lyceenne-a-marie-curie\/\" target=\"_blank\" rel=\"noreferrer noopener\">Protestation lyc\u00e9enne \u00e0 Marie-Curie<\/a><\/li><li><a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/03\/22\/revisions-du-bac-et-parcoursup\/\" target=\"_blank\" rel=\"noreferrer noopener\">R\u00e9visions du bac et Parcoursup<\/a><\/li><li><a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/03\/45-lyceens-a-cracovie\/\" target=\"_blank\" rel=\"noreferrer noopener\">45 lyc\u00e9ens \u00e0 Cracovie<\/a><\/li><li><a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/14\/parler-des-attentats-de-2015-aux-lyceens-de-marie-curie\/\" target=\"_blank\" rel=\"noreferrer noopener\">Parler des attentats de 2015 aux lyc\u00e9ens de Marie-Curie<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Le 7 avril, 29 \u00e9l\u00e8ves de Terminale TG9 du lyc\u00e9e Marie-Curie de Sceaux pr\u00e9sentaient le bilan carbone de la cit\u00e9 scolaire, qu\u2019ils avaient r\u00e9alis\u00e9 les mois pr\u00e9c\u00e9dents. Ils ont \u00e9valu\u00e9 les \u00e9missions de GES (gaz \u00e0 effet de serre) provenant de diff\u00e9rents domaines et ont imagin\u00e9 des solutions possibles. Le&#8230;<\/p>\n","protected":false},"author":11,"featured_media":9610,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[258,266],"tags":[],"class_list":["post-9587","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement","category-sceaux","entry","simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bilan Carbone Marie-Curie - La Gazette<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/20\/bilan-carbone-marie-curie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bilan Carbone Marie-Curie - La Gazette\" \/>\n<meta property=\"og:description\" content=\"Le 7 avril, 29 \u00e9l\u00e8ves de Terminale TG9 du lyc\u00e9e Marie-Curie de Sceaux pr\u00e9sentaient le bilan carbone de la cit\u00e9 scolaire, qu\u2019ils avaient r\u00e9alis\u00e9 les mois pr\u00e9c\u00e9dents. 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