> But then the nations that were the last to start switching will find their economies too inefficient and expensive to run with the fossil fuels while everyone

> But then the nations that were the last to start switching will find their economies too inefficient and expensive to run with the fossil fuels while everyone else is using much cheaper renewables, and will probably no longer have money for the switch, ending up in a major predicament. If all the fossil fuel is burned, we will probably never reach that point ; society breakdown will happen sooner.