The average American household spends about $2,000 a year on energy bills. Based upon both residential energy use and vehicle fuel efficiency, WalletHub ranked the 48 contiguous states for energy efficiency. The least efficient states were:
1. South Carolina
2. Louisiana
3. Alabama
4. Arkansas
5. Mississippi
6. Tennessee
7. Oklahoma
8. Georgia
9. Kentucky
10. West Virginia
Source: WalletHub
