Es ist der Stoff aus dem unsere Welt gemacht ist: Straßen, Brücken, Häuser und Offshore-Projekte fußen wortwörtlich auf ihm: Beton. Weltweit werden jedes Jahr rund 20 bis 30 Milliarden Tonnen verbraucht. Die Branche ist ein Massenmarkt und für fast ein Zehntel der globalen CO2-Emissionen verantwortlich. Denn für jede produzierte Tonne Beton fallen rund 100 Kilogramm Kohlendioxid an.
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