This is a very common sense solution, capturing Carbon from the environment and sinking it into the concrete. Improving the environmental aspects of concrete would be a huge win, reversing the impact of CO2 emissions. Wood has always been a way to capture carbon naturally, and store it in a construction material. This of course requires cutting down trees that have already absorbed the carbon - impacting the environment. "Recycling" the carbon from the atmosphere and storing it in concrete - big win. Nice Hunt.