Carbon Grove

Retire today: your USDC buys biochar carbon — CHAR (1 token = 1 tonne CO₂e) or CCC (1 token = 1 lb CO₂e) — on Base at the live pool price, and it lands directly in the NFT's contract. That address has no owner and no way to move tokens out, so the carbon is retired forever, shown on the NFT's card and the Carbon Grove board.

The CHAR pool is deep (low price impact). The CCC pool is still small — buying CCC costs more than spot but helps seed its market. The slippage guard shows you the price impact before you commit; you decide.

Endow forever: your USDC is minted 1:1 into CHAR-R / CCC-R retirement-fund tokens, locked into the NFT's contract permanently. The fund's lending yield keeps buying and retiring carbon on its own, forever, and part compounds so the endowment grows. Nobody — not you, not the NFT owner — is ever paid; the yield only retires carbon.

Note: CHAR-R retires fully. A CCC-R endowment locks and grows fine, but its retirement trickle is limited until the CCC pool deepens — the principal is safe and counted either way.