Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Giant 'sand battery' holds a week's heat for a whole town. Parent comment
Sand is really only useful here because that much clay is usually significantly more expensive and would take forever to dry out.
Source: researched the shit out of and have built a rocket stove.
There are no comments on this comment yet.
Sand is really only useful here because that much clay is usually significantly more expensive and would take forever to dry out.
Source: researched the shit out of and have built a rocket stove.