Australians produce 11 tons of CO2 for each of its people from their power plants -- the highest anywhere -- compared to 9 tons per person in the United States and 2 tons per person in China.
But the United States has the most CO2 emissions (2.79 billion tons), followed by China (2.66 billion tons). China, which soon is expected to pass the United States, is home to three of the world's five most CO2-polluting utilities.
China's Huaneng Power International leads all of the world's power companies, releasing nearly 292 million tons of CO2 annually. That's far more than Southern Co. and American Electric Power, the two biggest U.S. carbon emitters that each account for about 170 million tons a year, ranking sixth and seventh in the world.