{"id":6200,"date":"2026-10-21T18:15:22","date_gmt":"2026-10-21T18:15:22","guid":{"rendered":"https:\/\/zawaya24.com\/ar\/?p=6200"},"modified":"2026-10-21T21:00:17","modified_gmt":"2026-10-21T21:00:17","slug":"rapport-pnue-ecart-emissions-2026","status":"publish","type":"post","link":"https:\/\/zawaya24.com\/fr\/rapport-pnue-ecart-emissions-2026\/","title":{"rendered":"Climat : l&rsquo;ONU chiffre \u00e0 18 % d&rsquo;ici 2030 les baisses d&rsquo;\u00e9missions pour revenir sous 1,5 \u00b0C"},"content":{"rendered":"<p>Le r\u00e9chauffement de la plan\u00e8te d\u00e9passera le seuil de 1,5 \u00b0C par rapport \u00e0 l&rsquo;\u00e8re pr\u00e9industrielle, avertit le Programme des Nations unies pour l&rsquo;environnement (PNUE) dans son rapport 2026 sur l&rsquo;\u00e9cart entre les besoins et les perspectives en mati\u00e8re de r\u00e9duction des \u00e9missions, publi\u00e9 ce mercredi 21 octobre \u00e0 Nairobi. Pour revenir sous ce seuil avant la fin du si\u00e8cle, les \u00e9missions mondiales de gaz \u00e0 effet de serre devront reculer de 18 % d&rsquo;ici 2030 et de 45 % d&rsquo;ici 2035 par rapport \u00e0 2025.<\/p>\n<p>Intitul\u00e9 \u00ab Le point de retour \u00bb, le rapport \u00e9tudie un sc\u00e9nario de \u00ab plus faible d\u00e9passement possible \u00bb : le pic de r\u00e9chauffement serait contenu entre 1,7 et 1,8 \u00b0C vers le milieu du si\u00e8cle, avant un retour \u00e0 1,5 \u00b0C ou moins en 2100, avec une probabilit\u00e9 d&rsquo;environ 50 %. Cette trajectoire suppose une baisse des \u00e9missions de 69 % d&rsquo;ici 2040.<\/p>\n<h2>Des engagements nationaux loin du compte<\/h2>\n<p>La mise en \u0153uvre int\u00e9grale des contributions d\u00e9termin\u00e9es au niveau national (CDN), d\u00e9pos\u00e9es par les \u00c9tats au titre de l&rsquo;Accord de Paris, ne r\u00e9duirait les \u00e9missions que de 5 \u00e0 8 % d&rsquo;ici 2030 et de 11 \u00e0 15 % d&rsquo;ici 2035, selon le PNUE. Le monde se dirigerait alors vers un r\u00e9chauffement de 2,6 \u00b0C au cours du si\u00e8cle, et de 2,8 \u00b0C si les politiques actuelles restent inchang\u00e9es.<\/p>\n<p>Ces projections sont plus sombres que celles de l&rsquo;an dernier, explique le rapport, en raison du retrait des \u00c9tats-Unis de l&rsquo;Accord de Paris et de la r\u00e9vision des estimations d&rsquo;\u00e9missions pass\u00e9es ; les nouvelles CDN d\u00e9pos\u00e9es depuis n&rsquo;ont eu qu&rsquo;un effet n\u00e9gligeable. M\u00eame dans le sc\u00e9nario le plus optimiste, qui combine toutes les CDN et les objectifs de neutralit\u00e9 carbone annonc\u00e9s, le r\u00e9chauffement ne serait limit\u00e9 qu&rsquo;\u00e0 2,1 \u00b0C.<\/p>\n<blockquote>\n<p>\u00ab Le d\u00e9passement n&rsquo;est pas une capitulation. Nous pouvons encore le maintenir aussi faible et aussi bref que possible, et ramener les temp\u00e9ratures sous 1,5 degr\u00e9 d&rsquo;ici la fin du si\u00e8cle \u00bb, a d\u00e9clar\u00e9 le secr\u00e9taire g\u00e9n\u00e9ral de l&rsquo;ONU, Ant\u00f3nio Guterres, dans un message accompagnant la publication.<\/p>\n<\/blockquote>\n<p>Chaque tranche de cinq ann\u00e9es d&rsquo;\u00e9missions de CO2 au rythme actuel rel\u00e8ve le pic de r\u00e9chauffement d&rsquo;environ 0,1 \u00b0C, souligne le PNUE. Le sc\u00e9nario de plus faible d\u00e9passement exige en outre de retirer de l&rsquo;atmosph\u00e8re et de stocker durablement quelque 320 gigatonnes de CO2 au cours du si\u00e8cle, soit pr\u00e8s de huit ann\u00e9es d&rsquo;\u00e9missions mondiales au niveau de 2024.<\/p>\n<h2>Les renouvelables plus rapides que pr\u00e9vu<\/h2>\n<p>Le rapport rel\u00e8ve aussi des avanc\u00e9es : depuis l&rsquo;Accord de Paris, les capacit\u00e9s d&rsquo;\u00e9lectricit\u00e9 renouvelable ont progress\u00e9 trois fois plus vite qu&rsquo;anticip\u00e9, et le d\u00e9ploiement du solaire photovolta\u00efque sept fois plus vite. L&rsquo;\u00e9valuation de plus de 220 politiques climatiques montre que les mesures prises dans le secteur \u00e9lectrique ont r\u00e9duit les \u00e9missions de 9 % en moyenne, et que les instruments \u00e9conomiques, march\u00e9s du carbone et taxes carbone, ont obtenu des baisses de 5 \u00e0 13 %.<\/p>\n<p>Le PNUE propose de prolonger \u00e0 2035 et 2040 les objectifs du premier bilan mondial : au moins tripler les capacit\u00e9s renouvelables d&rsquo;ici 2035 par rapport \u00e0 2025, r\u00e9duire d&rsquo;au moins 55 % la part du charbon dans l&rsquo;approvisionnement \u00e9nerg\u00e9tique, abaisser les \u00e9missions de m\u00e9thane d&rsquo;au moins 25 % \u00e0 la m\u00eame \u00e9ch\u00e9ance, et sortir de facto de l&rsquo;\u00e9lectricit\u00e9 au charbon en 2040.<\/p>\n<p>\u00ab Chaque fraction de degr\u00e9 suppl\u00e9mentaire et chaque ann\u00e9e suppl\u00e9mentaire de r\u00e9chauffement au-dessus de 1,5 \u00b0C accroissent les impacts et les risques climatiques \u00bb, a estim\u00e9 la directrice ex\u00e9cutive du PNUE, Inger Andersen, pour qui le retour \u00e0 ce seuil d&rsquo;ici la fin du si\u00e8cle \u00ab est possible \u00bb, \u00e0 condition que les \u00c9tats adoptent des politiques entra\u00eenant des r\u00e9ductions rapides, profondes et durables.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le PNUE pr\u00e9vient que le r\u00e9chauffement d\u00e9passera le seuil de 1,5 \u00b0C et fixe la marche \u00e0 suivre pour y revenir avant la fin du si\u00e8cle : -18 % d&rsquo;\u00e9missions d&rsquo;ici 2030 et -45 % d&rsquo;ici 2035 par rapport \u00e0 2025.<\/p>\n","protected":false},"author":3,"featured_media":6199,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,11],"tags":[5617,5615,5614,5612],"class_list":["post-6200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment","category-international-news","tag-antonio-guterres-onu","tag-inger-andersen","tag-accord-de-paris","tag-pnue"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Le rapport 2026 du PNUE sur l&#039;\u00e9cart d&#039;\u00e9missions r\u00e9clame une baisse de 18 % des \u00e9missions mondiales d&#039;ici 2030 et de 45 % d&#039;ici 2035 pour revenir \u00e0 1,5 \u00b0C.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Hind Dakir\"\/>\n\t<link rel=\"canonical\" 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