Great article. I am currently designing a 'C sync sanctuary' or what I call my Dwelling on Drawdown project. One carbon sequestration material that most have never heard of in terms of buildings is biochar. Using high heat & low oxygen short term carbon from a wide range of organic materials can be turned into long-lasting carbon (i.e. biochar) that has traditionally been used to increase soil carbon.
I'll be building with straw bale (grown 2 miles from the home) and adding biochar into the plaster covering (biochar adds humidity control, insulating and electro-magnetic shielding properties; more info and pictures here: https://www.biochar-journal.org/en/ct/3-The-use-of-biochar-as-building-m...). I'm also designing it into trenches for water and possibly for electricity (that one needs more investigation). My leach field will have a layer of biochar at the bottom to bind toxins and the lawn will have it to improve water and nutrient holding. Hopefully the driveway will incorporate it as well.
There are also a growing number of companies embedding biochar in concrete, composite lumber, fence posts, bricks, roof tiles, siding materials and asphalt. It is an exciting time to see how we can maximize carbon storage above ground.
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