Trinidad & Tobago, Australia, and Turkmenistan are high in addition to Qatar. What they all have in common is they are high LNG exporters, which involves liquif

Trinidad & Tobago, Australia, and Turkmenistan are high in addition to Qatar. What they all have in common is they are high LNG exporters, which involves liquifaction trains. LNG liquifaction trains are extremely CO2 intensive, along with heavy oil refining (see Curacao, Aruba, et al per capita CO2)