Meanwhile, a new study has ranked the world’s worst utility companies for global warming pollution. According to the Center for Global Development, one Southern Company plant in Georgia emits more carbon dioxide every year than Brazil’s entire industrial sector. Australia is the worst per capita polluter. Power plants there emit 10 tons of carbon dioxide per person — five times as much as China. The U.S. remains the worst overall polluter, producing 2.8 billion tons of carbon dioxide each year.