ScienceDaily: The cement used in Oslo’s new Bjørvika tunnel kept 8,000 tonnes of CO2 from entering the environment — the equivalent of 60 million vehicle trips through the tunnel. The more environment-friendly concrete is the result of intensive research collaboration. The Norwegian concrete industry won worldwide acclaim for its gigantic North Sea constructions. Its best-known achievement was the Troll A platform in 1995 — the largest structure ever moved by man. Today the concrete …