Please go by sovereign nation. China is the world's largest contributing country to CO2 emissions—a trend that has steadily risen over the years—now producing 1

Please go by sovereign nation. China is the world's largest contributing country to CO2 emissions—a trend that has steadily risen over the years—now producing 10.06 billion metric tons of CO2 (and increasing). US is half of that and falling further. India is at #3 with half of US emissions.