What would most likely to happen to the carbon cycle if there were no more plants on earth

Since there is no plants, the amount of carbon will go higher and higher, and nobody can get rid of the carbon

we would be all dead

In reality, not much would be hurt. Everything that is living releases carbon dioxide or something that can be used. When we inhale, we inhale oxygen. When we exhale, we exhale carbon dioxide which could also be used for the carbon cycle.