Great news. Concrete industry continues to excel in its innovation, contrary to wood construction industry. Which only excels in its innovation of continuing tree genocide. The novelty is the continuation of unsustainable practices. Concrete absorbs CO2 from air. In its lifecycle, it is expected to reabsorb all CO2 associated with its emissions. If you can create carbon neutral cement, this means that concrete construction is carbon negative.
For this comment not to be absolutely mad, you better be full time vegan and perhaps consuming mainly rocks.