https://fountain.fm/episode/qc3szNA52Jn9Y7T6lqsm
About 1 hour mark there's a question that nostr:nprofile1qqs2rlzal4lleatrezg4tdrxw5d4srg3tcfkutuvjr5fzvu9h0kmrncpzemhxue69uhhyetvv9ujuvrcvd5xzapwvdhk6qgdwaehxw309aukzcn49ekk2qghwaehxw309aex2mrp0yh8x6tpd4ehgu3wvdhk68uj6gq responded to about just this. He is working on a biochar course rn