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http://www.bulletins-electroniques.com/actualites/72641.htm
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http://www.goodplanet.info/Contenu/De...France-integrent-l-initiative-Clinton
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http://www.futura-sciences.com/planet...le-CO2-devenait-une-source-d-energie]
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http://www.futura-sciences.com/planet...-gaz-effet-serre-co2-methane-pire-565
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