I think its a lot more coal. I am also unsure why we would carbon tax ourselves, making our own production more expensive, but maintain free trade with the largest coal user on the planet with little to no environmental laws. If you saw and smelt the rivers in China I think you'd realize what a dirty place it is.
Heres a nice looking documentary on it that I found: https://www.youtube.com/watch?v=GN0AVXZ_RrQ