Plate tectonics helps with carbon recycling and regulating the temperature of the planet. Temperature drops, rainfall drops (less evaporation), rock weathering

Plate tectonics helps with carbon recycling and regulating the temperature of the planet. Temperature drops, rainfall drops (less evaporation), rock weathering slows down (rock weathering normally removes CO2 from the atmosphere). With plate tectonics, volcanism continues to spew CO2 in the atmosphere, temperature eventually rises. Negative feedback. No plate tectonics, no volcanism, albedo increases, temperature drops further. Positive feedback.