10. South Carolina
> 1-yr. change in energy-related carbon dioxide emissions: +9.1% (+5.8 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -0.9% (-625,075 metric tons)
> Energy-related carbon dioxide emissions in 2021: 13.4 metric tons per person – 23rd lowest (69.3 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 12.4 metric tons per person – 22nd lowest (63.6 million metric tons total)
9. Maryland
> 1-yr. change in energy-related carbon dioxide emissions: +9.3% (+4.5 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -4.5% (-2.5 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 8.5 metric tons per person – 4th lowest (52.6 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 7.8 metric tons per person – 4th lowest (48.1 million metric tons total)
8. Kentucky
> 1-yr. change in energy-related carbon dioxide emissions: +10.0% (+10.1 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -4.7% (-5.5 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 24.7 metric tons per person – 7th highest (111.3 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 22.4 metric tons per person – 9th highest (101.2 million metric tons total)
7. Alabama
> 1-yr. change in energy-related carbon dioxide emissions: +10.1% (+10.0 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -0.2% (-202,453 metric tons)
> Energy-related carbon dioxide emissions in 2021: 21.5 metric tons per person – 14th highest (108.4 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 19.6 metric tons per person – 16th highest (98.4 million metric tons total)
6. Pennsylvania
> 1-yr. change in energy-related carbon dioxide emissions: +10.5% (+20.2 million metric tons)
> 5-yr. change in energy-related carbon dioxide emissions: -0.8% (-1.8 million metric tons)
> Energy-related carbon dioxide emissions in 2021: 16.4 metric tons per person – 22nd highest (213.5 million metric tons total)
> Energy-related carbon dioxide emissions in 2020: 14.9 metric tons per person – 22nd highest (193.3 million metric tons total)
