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{"id":2367303,"date":"2021-04-09T13:07:35","date_gmt":"2021-04-09T11:07:35","guid":{"rendered":"https:\/\/www.phonandroid.com\/?p=2367303"},"modified":"2023-12-19T09:51:21","modified_gmt":"2023-12-19T08:51:21","slug":"bitcoin-ethereum-un-accord-mondial-pourrait-aboutir-sur-zero-emission-de-co2-dici-2040","status":"publish","type":"post","link":"https:\/\/www.phonandroid.com\/bitcoin-ethereum-un-accord-mondial-pourrait-aboutir-sur-zero-emission-de-co2-dici-2040.html","title":{"rendered":"Bitcoin, Ethereum : un accord mondial pourrait aboutir sur z\u00e9ro \u00e9mission de CO2 d’ici 2040"},"content":{"rendered":"

Des professionnels du Bitcoin, Ethereum et cryptomonnaies sont \u00e0 la recherche d'un accord pour r\u00e9duire l'\u00e9norme empreinte carbone du secteur. L'objectif est d'arriver des fermes de minages utilisant 100% d'\u00e9nergies renouvelables d'ici 2030, et d'atteindre 0 \u00e9missions de CO2 nettes d'ici 2040. Le projet d\u00e9crit \u00e9galement une m\u00e9thodologie de mesure standardis\u00e9e. L'accord a le soutien de nombreux acteurs majeurs de l'industrie, mais des doutes subsistent au sujet du Bitcoin dont le crypto-mining gaspille encore beaucoup trop d'\u00e9nergie.<\/strong><\/p>\n

\"accord
Cr\u00e9dits : Unsplash<\/figcaption><\/figure>\n

Certaines cryptomonnaies sont une vraie catastrophe pour l'environnement<\/strong>, et c'est en particulier vrai pour le Bitcoin<\/a>. Pour fonctionner, la blockchain du Bitcoin a besoin de mineurs – des particuliers ou professionnels qui disposent d'appareils sp\u00e9cialis\u00e9s (g\u00e9n\u00e9ralement des syst\u00e8mes dot\u00e9s d'un processeur FPGA) con\u00e7us pour calculer les d\u00e9fis math\u00e9matiques n\u00e9cessaires au fonctionnement des transactions<\/strong>. L'architecture de ce syst\u00e8me est qualifi\u00e9e de Proof-of-work<\/strong> car ce sont des “preuves de calcul” qui permettent d'un c\u00f4t\u00e9 de r\u00e9gler la question de la confiance dans les transactions, tout en permettant au propri\u00e9taire des machines qui ont effectu\u00e9 ces calculs de se r\u00e9tribuer en leur attribuant p\u00e9riodiquement des Bitcoin.<\/p>\n

Pour l'heure, la plupart des cryptomonnaies, y compris l'Ethereum, s'appuient sur le Proof-of-work pour fonctionner<\/strong>. Mais en ce qui concerne l'Ethereum<\/a>, la blockchain, dont la gouvernance est stimul\u00e9e par les interventions de son fondateur Vitalik Buterin, va tr\u00e8s prochainement passer \u00e0 un autre mod\u00e8le, celui dit du Proof-of-stake (preuve de propri\u00e9t\u00e9)<\/strong>. L'id\u00e9e du Proof-of-stake c'est que des individus sur la blockchain, assureront le r\u00f4le de validateurs. Pour le devenir, il faut poss\u00e9der un certain nombre d'Ethereum – en l'occurence au moins 32<\/strong>. Et comme avec le Proof-of-work, le syst\u00e8me r\u00e9tribue les validateurs pour leurs validations par des blocs. Ils ont \u00e0 cet \u00e9gard tout int\u00e9r\u00eat \u00e0 ne pas se tromper, ou \u00e0 tenter de manipuler le syst\u00e8me, pour plusieurs raisons.<\/p>\n