That's because it takes time. It will take decades to convert a lot of key systems, even if renewable energy is cheaper. The infrastructure that burns fossil f

That's because it takes time. It will take decades to convert a lot of key systems, even if renewable energy is cheaper. The infrastructure that burns fossil fuel is highly distributed. Millions (billions?) of cars on the road. Worse, millions (billions) of cold-climate buildings heated by gas or coal. In the meantime, it's not growing exponentially. It had actually leveled off. There was a spike in the past couple of years, but it doesn't seem reasonable that it's a sustained pattern.