"Sargablock: Bricks from Seaweed" https://news.ycombinator.com/item?id=37175721 https://news.ycombinator.com/item?id=37175721 There are also interlocking block

"Sargablock: Bricks from Seaweed" https://news.ycombinator.com/item?id=37175721 https://news.ycombinator.com/item?id=37175721 There are also interlocking blocks that don't require mortar. Lime for hempcrete can be made from algae. "Eco-Friendly Construction Breakthrough: Lego-like Hempcrete Blocks That Don't Require Framing" [with Hempwood or spec pine] https://news.ycombinator.com/item?id=37643102 https://news.ycombinator.com/item?id=37643102 There are Structural and Non-structural {brick, concrete, hempcrete, sargablock, CEB Compressed Earth block} construction products and methods with varying levels of support in varying building codes. "IRC Commentary Submitted to International Code Council" (2023) https://www.hempbuildmag.com/home/irc-commentary https://www.hempbuildmag.com/home/irc-commentary : > The Hemp Building Institute, in partnership with the US Hemp Building Association, completed the final steps to include hemp-lime in the US residential building codes this summer. > The new International Residential Code will be updated starting in January, 2024. States and building departments can adopt the code or parts of the code. The US Farm Bills were good choices. "Zero energy ready homes are coming" https://news.ycombinator.com/item?id=35060298 https://news.ycombinator.com/item?id=35060298 "Ask HN: Why don't datacenters have passive rooflines like Net Zero homes?" https://news.ycombinator.com/item?id=37579505 https://news.ycombinator.com/item?id=37579505