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https://crypto-planet.net/2018/10/26/blockchains-for-sustainable-development-%ce%b7-%cf%86%ce%b9%ce%bb%ce%b1%ce%bd%ce%b8%cf%81%cf%89%cf%80%ce%af%ce%b1-%cf%80%ce%b1%ce%af%cf%81%ce%bd%ce%b5%ce%b9-%ce%bc%ce%ad%cf%81%ce%bf%cf%82-%cf%83/
Blockchains for Sustainable Development Παγκόσμιο Φόρουμ Επενδύσεων 2018