{"id":16071,"date":"2021-04-22T12:47:00","date_gmt":"2021-04-22T10:47:00","guid":{"rendered":"https:\/\/www.altitude.news\/?p=16071"},"modified":"2021-09-29T09:17:11","modified_gmt":"2021-09-29T07:17:11","slug":"everest-pollution-vetements-tentes-impermeables","status":"publish","type":"post","link":"https:\/\/www.altitude.news\/culture\/sciences\/2021\/04\/22\/everest-pollution-vetements-tentes-impermeables\/","title":{"rendered":"Everest : une pollution issue des v\u00eatements et tentes imperm\u00e9ables"},"content":{"rendered":"\n

Une \u00e9tude scientifique am\u00e9ricaine r\u00e9alis\u00e9e sur des pr\u00e9l\u00e8vements du printemps 2019 \u00e0 l\u2019Everest montre la pr\u00e9sence de polluants tr\u00e8s redout\u00e9s. Ils proviennent en partie des traitements qui rendent le mat\u00e9riel de montagne imperm\u00e9able.<\/strong><\/p>\n\n\n\n

On savait les hautes montagnes de la plan\u00e8te concern\u00e9es par les micro-plastiques<\/a>, d\u00e9sormais on a la preuve que certains polluants chimiques y sont \u00e9galement pr\u00e9sents. Il s\u2019agit de Perfluor\u00e9s (PFAS), une famille de perturbateurs endocriniens utilis\u00e9s dans de nombreux domaines, et notamment dans le textile. Ces polluants sont pr\u00e9sents dans l\u2019atmosph\u00e8re et peuvent donc, \u00e0 la faveur du vent, se retrouver sur l\u2019Everest. Mais pas dans de telles proportions. L\u2019\u00e9quipe de chercheurs qui s\u2019est rendue \u00e0 l\u2019Everest au printemps 2019 pencherait plut\u00f4t pour d\u2019autres sources de pollution. En lien avec l\u2019exploitation touristique de cette montagne mythique. D\u2019autant que la concentration en Perfluor\u00e9s est plus importante dans les zones de passage important. Comme le camp de base.<\/p>\n\n\n\n

La cause atmosph\u00e9rique \u00e9cart\u00e9e<\/strong><\/h2>\n\n\n\n

En effectuant des pr\u00e9l\u00e8vements additionnels sur de la neige fraichement tomb\u00e9e, les chercheurs ont remarqu\u00e9 la quasi-absence de ces polluants. Confirmant que la source atmosph\u00e9rique n\u2019\u00e9tait que marginale. La cause pourrait donc bien \u00eatre attribu\u00e9e aux grimpeurs et \u00e0 leur mat\u00e9riel. Leurs v\u00eatements mais aussi leurs tentes sont g\u00e9n\u00e9ralement recouverts d\u2019un traitement d\u00e9perlant ou imperm\u00e9abilisant. Derri\u00e8re ces propri\u00e9t\u00e9s indispensables aux exp\u00e9ditions, se cachent bien souvent l\u2019utilisation de ces Perfluor\u00e9s. Si la production de textile contenant des PFAS est largement encadr\u00e9e sinon interdite en Europe comme aux Etats-Unis, ce n\u2019est pas le cas dans le monde entier. Sur l\u2019Everest, le mat\u00e9riel utilis\u00e9 massivement ne tombe pas sous le coup de ce type de r\u00e8glementation. Certains pays d\u2019Asie, qui produisent massivement du textile technique, n\u2019ont pas le m\u00eame type d\u2019encadrement.<\/p>\n\n\n\n

Les PFAS sont tr\u00e8s r\u00e9sistants, la pollution de l’Everest irr\u00e9versible ?<\/strong><\/h2>\n\n\n\n

La particularit\u00e9 de ces Perfluor\u00e9s est leur r\u00e9sistance. Ils ne se d\u00e9gradent pas dans l\u2019environnement, ni dans le corps humain. \u00ab Si elles continuent \u00e0 \u00eatre rejet\u00e9es, [ces particules] ne cesseront de s\u2019accumuler dans l\u2019environnement, dans l\u2019eau potable et dans les aliments \u00bb pr\u00e9vient l\u2019Agence Europ\u00e9enne des Produits Chimiques (ECHA).<\/p>\n\n\n\n

D\u2019apr\u00e8s les scientifiques de l\u2019Universit\u00e9 du Maine qui ont r\u00e9alis\u00e9 ces relev\u00e9s sur l\u2019Everest, cit\u00e9s par le Washington Post (lien en anglais)<\/em><\/a>, l\u2019impact des PFAS combin\u00e9 \u00e0 celui des micro-plastiques pourraient \u00eatre tr\u00e8s dommageable pour la sant\u00e9 des populations. Notamment celles qui d\u00e9pendent de l\u2019eau de fonte himalayenne. Des millions d\u2019habitants d\u2019Asie boivent l\u2019eau venue des plus hauts sommets de la plan\u00e8te. Les scientifiques expliquent que les concentrations de polluants se dirigent dangereusement vers des niveaux o\u00f9 la consommation d\u2019eau n\u2019est plus \u00ab s\u00fbre \u00bb.  <\/p>\n\n\n\n

Illustration \u00a9 Pasang Lama \u2013 CC BY-SA 4.0<\/a>\u00a0\u00a0<\/em><\/p>\n\n\n\n\n\n

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\n 4.6\/5 - (18 votes) <\/div>\n <\/div>\n\n","protected":false},"excerpt":{"rendered":"

Une \u00e9tude scientifique am\u00e9ricaine r\u00e9alis\u00e9e sur des pr\u00e9l\u00e8vements du printemps 2019 \u00e0 l\u2019Everest montre la pr\u00e9sence de polluants tr\u00e8s redout\u00e9s. Ils proviennent en partie des … <\/p>\n","protected":false},"author":2,"featured_media":16072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[43],"tags":[123],"class_list":["post-16071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciences","tag-everest"],"yoast_head":"\nEverest : une pollution issue des v\u00eatements et tentes imperm\u00e9ables<\/title>\n<meta name=\"description\" content=\"Une \u00e9tude am\u00e9ricaine d\u00e9montre la pr\u00e9sence de Perfluor\u00e9s en quantit\u00e9 significative sur les pentes de l'Everest, cette pollution viendrait...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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