Could you keep some running score of the entire carbon footprint of the current chunk? Then if the player moved into a new chunk, you would use the old chunk's

Could you keep some running score of the entire carbon footprint of the current chunk? Then if the player moved into a new chunk, you would use the old chunk's last score as having some effect on the current chunk? I guess that wouldn't account for continued tree growth or burning in the chunk you just left though...