Brent Constantz is CEO of Blue Planet, a company that makes limestone aggregate for concrete from demolished pieces of concrete plus carbon dioxide, which he captures from nearby plants that would otherwise emit it into the atmosphere. This means that the aggregate pebbles that he produces are very carbon-negative — absorbing CO2 from the atmoosphere. Although the cement component of concrete is the largest contributor of CO 2 in the whole concrete-making process, with Constantz’s technology, the amount of CO2 mitigated by his aggregates is so great as to strongly offset the sources from manufacturing the cement. He is planning to establish 400 plants in China to capture and sequester carbon in concrete. There is an enormous global potential for mitigating carbon by locking it up in building materials. For the video, audio podcast, transcript or comments column: https://tosavetheworld.ca/episode-383-making-carbon-negative-concrete/.
Panelist:
• Brent Constantz
To Post a Comment
Please wait a few seconds for the comments to load at the bottom of this page. Then read the ideas other people have shared and reply or add your own knowledge. The space for comments is in a pale font. It’s good to give your comment a title by selecting it and clicking the “B” (for “boldface”). And you can italicize passages with the “I”, indent, add hyperlinks (with the chain symbol) or even attach a photo or graphic from your hard drive by clicking the paperclip at the right side of the space. Have fun with it!
We produce several one-hour-long Zoom conversations each week about various aspects of six issues we address. You can watch them live and send a question to the speakers or watch the edited version later here or on our Youtube channel.