No doubt largely fossil fuel generated energy.
You know the thing that gets me over and over in all this energy and climate change BS, is why fusion energy has not become the norm or widespread yet.
Nuclear is icky. A deeper reason is that fusion energy won’t do the job of turning what’s left of the middle class into a bunch of frightened, shivering troglodytes, with lives that are solitary, poor, nasty, brutish and short. The stuff of paradise.