Amazon's new data center in Texas may be self-sustaining, but at what cost? The massive gas plant powering it could emit 33 million tons of carbon pollution, surpassing the biggest emitter in the US.

Amazon confirmed Friday it is financing a massive, private gas power plant in Texas that could become the single largest source of greenhouse gas emissions in the United States.

Previously filed permits for the plant show it would have 35 turbines and generate 7.65 gigawatts -- larger than any gas plant currently operating in the United States. A bigger…