40. Arizona
> 1-yr. change in energy-related carbon dioxide emissions: +3.6% (+2.9 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -8.2% (-7.5 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 11.4 metric tons per person – 17th lowest (83.0 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 11.2 metric tons per person – 18th lowest (80.2 million metric tons total)
39. Delaware
> 1-yr. change in energy-related carbon dioxide emissions: +3.9% (+489,763 metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -5.8% (-802,128 metric tons)
> Energy-related carbon dioxide emissions in 2021: 12.9 metric tons per person – 21st lowest (13.0 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 12.6 metric tons per person – 23rd lowest (12.5 million metric tons total)
38. Oklahoma
> 1-yr. change in energy-related carbon dioxide emissions: +4.1% (+3.4 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -6.0% (-5.7 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 22.0 metric tons per person – 12th highest (87.8 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 21.3 metric tons per person – 13th highest (84.4 million metric tons total)
37. North Dakota
> 1-yr. change in energy-related carbon dioxide emissions: +4.2% (+2.3 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -0.7% (-382,006 metric tons)
> Energy-related carbon dioxide emissions in 2021: 72.7 metric tons per person – 2nd highest (56.5 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 69.6 metric tons per person – 2nd highest (54.3 million metric tons total)
36. Ohio
> 1-yr. change in energy-related carbon dioxide emissions: +4.5% (+8.4 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -5.4% (-11.0 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 16.5 metric tons per person – 21st highest (194.0 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 15.7 metric tons per person – 21st highest (185.7 million metric tons total)
