When all plant life on Earth runs out of carbon to grow then what happens?

@Freeranger without carbon the cowshit is useless

@Harmony Not to the worms. They control the soil and rule the world. They just don't hire spokesmodels.

@Freeranger so how does the worms pass on the co2 to the plants?

@Harmony Hmmm....see here lies the rub. Worm scientists hypothesize that they do that anally. Rimming appears to be a stimulus. But what do I know? I mean, who is that catalyst?

@Freeranger I can't imagine that being a solution. Earth worms sequest Co2 as much as they emit. But just not enough. An interesting problem