This unique form of carbon capture is the result of a 2021 scientific study of synthesizing starch from CO2. The City Chloroplast skyscraper concept puts this research into practical use, doing the job of a massive plant that absorbs CO2 from the city air on a regular basis. An entry at this year's eVolo Skyscraper
U.S architecture and design magazine Evolo has been running the prestigious competition since 2006, and this year the jury chose from over 400 designs.