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{"id":575,"date":"2009-09-18T08:28:45","date_gmt":"2009-09-18T06:28:45","guid":{"rendered":"https:\/\/energethique.be\/?p=575"},"modified":"2009-09-18T09:12:44","modified_gmt":"2009-09-18T07:12:44","slug":"lalcool-aussi-mauvais-que-lessence","status":"publish","type":"post","link":"https:\/\/energethique.be\/2009\/lalcool-aussi-mauvais-que-lessence\/","title":{"rendered":"L’alcool aussi mauvais que l’essence ?"},"content":{"rendered":"Selon une \u00e9tude men\u00e9e au Br\u00e9sil par le minist\u00e8re de l’environnement les voitures fonctionnant \u00e0 l’alcool polluent autant que celles \u00e0 l’essence.<\/p>\n
Derri\u00e8re cette constatation primaire il y a cependant lieu de mod\u00e9rer l\u00e9g\u00e8rement ces propos, en effet l’\u00e9tude portait uniquement sur trois gaz polluants qui n’ont pas d’effet sur le r\u00e9chauffement climatique \u00e0 savoir le monoxyde de carbone (CO ou connu dans le grand public comme le tueur silencieux) les hydrocarbures et l’oxyde de nitrog\u00e8ne (NOx).<\/p>\n
L’alcool provenant des cannes \u00e0 sucre est consid\u00e9r\u00e9 comme un carburant vert dont les \u00e9missions de CO\u00b2 sont compens\u00e9es par leurs absorptions lors de la pousse de la plante.<\/p>\n
Pour concr\u00e9tiser cette \u00e9tude c’est pas moins de 250 \u00e9valuations qui ont \u00e9t\u00e9 faites sur les voitures \u00abFlex Fuel\u00bb qui fonctionnent aussi bien \u00e0 l’essence qu’\u00e0 l’alcool et qui repr\u00e9sentent 85% des v\u00e9hicules circulant au Br\u00e9sil.<\/p>\n
<\/p>\n
Selon cette \u00e9tude parmi les quinze plus mauvaises notes plus de la moiti\u00e9 sont obtenues par les v\u00e9hicules fonctionnant uniquement \u00e0 l’alcool ou au Flex Fuel.<\/p>\n
Mod\u00e9rons les propos car les \u00e9missions bien que plus \u00e9lev\u00e9es que pour un moteur essence traditionnel restaient inf\u00e9rieures aux normes br\u00e9siliennes.<\/p>\n
Que retenir de cette \u00e9tude ?<\/p>\n
Tout d’abord rappelons que l’alcool comme carburant est uniquement envisageable au Br\u00e9sil o\u00f9 la culture de la canne \u00e0 sucre fourni suffisamment de d\u00e9chet pour \u00eatre transform\u00e9 en alcool.<\/p>\n
Il serait inconcevable de sacrifier des for\u00eats enti\u00e8res ou d’affamer la moiti\u00e9 du monde pour permettre \u00e0 l’autre moiti\u00e9 d’aller faire son lotto, tierc\u00e9, … (liste non exhaustive) en voiture.<\/p>\n
Ensuite retenons \u00e9galement qu’une solution a priori verte se doit d’\u00eatre envisag\u00e9e sur toute sa cha\u00eene de production.<\/p>\n
Il serait ridicule de n’envisager que les \u00e9missions derri\u00e8re un pot d’\u00e9chappement ou au sommet d’une chemin\u00e9e sans tenir compte des pollutions \u00abcollat\u00e9rales\u00bb engendr\u00e9es.<\/p>\n
Pour terminer ne nous focalisons pas uniquement sur le dioxyde de carbone, il y a beaucoup d’autres polluants.<\/p>\n
Ainsi vous entendrez certainement parler ou vous avez entendu parler d’empreinte carbone (ou carbone foot print), ne vous arr\u00eatez pas \u00e0 l’une ou l’autre valeur comme simple comparaison entre deux produits.<\/p>\n
Ce n’est pas parce que l’empreinte carbone est meilleure que globalement l’effet sur l’environnement est meilleure.<\/p>\n
Il faudrait que je vous parle de LCA ( Life Cycle Analysis) ou analyse de cycle de vie un de ces jours …<\/p>\n
Enfin c’est bien connu chez nous : alcool au volant danger au tournant !<\/p>\n
Via Le Soir<\/p>\n","protected":false},"excerpt":{"rendered":"
Selon une \u00e9tude men\u00e9e au Br\u00e9sil par le minist\u00e8re de l’environnement les voitures fonctionnant \u00e0 l’alcool polluent autant que celles \u00e0 l’essence.<\/p>\n
Derri\u00e8re cette constatation primaire il y a cependant lieu de mod\u00e9rer l\u00e9g\u00e8rement ces propos, en effet l’\u00e9tude portait uniquement sur trois gaz polluants qui n’ont pas d’effet sur le r\u00e9chauffement climatique \u00e0 savoir le monoxyde de carbone (CO ou connu dans le grand public comme le tueur silencieux) les hydrocarbures et l’oxyde de nitrog\u00e8ne (NOx).<\/p>\n
L’alcool provenant des cannes \u00e0 […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[3,9,12],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pBGwz-9h","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/575"}],"collection":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/comments?post=575"}],"version-history":[{"count":0,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/575\/revisions"}],"wp:attachment":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/media?parent=575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/categories?post=575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/tags?post=575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}