they can grow nanotubes with simple electrolysis, and the only inputs are electricity and co2. They've got a version that works in a gas plant's exhaust, and a version that's completely solar. It's still early - like, hand-assembled by grad students early - but I cannot imagine that this is not going to be revolutionary
and and and you can use carbon-negative nanotubes as ingredients in other building materials, which makes them stronger, so you need less of it, so you emit less co2 making (for example) concrete: https://cpb-us-e1.wpmucdn.com/blogs.gwu.edu/dist/d/73/files/...
(sorry for multireplies but this concept is just so exciting to me)
they can grow nanotubes with simple electrolysis, and the only inputs are electricity and co2. They've got a version that works in a gas plant's exhaust, and a version that's completely solar. It's still early - like, hand-assembled by grad students early - but I cannot imagine that this is not going to be revolutionary