Guardian: Cement, a vast source of planet-warming carbon dioxide, could be transformed into a means of stripping the greenhouse gas from the atmosphere, thanks to an innovation from British engineers. The new environmentally formulation means the cement industry could change from being a “significant emitter to a significant absorber of CO2,” says Nikolaos Vlasopoulos, chief scientist at London-based Novacem, whose invention has garnered support and funding from industry and …