At the recent UN Climate Change Conference in Glasgow, world leaders convened to negotiate new goals for reducing carbon emissions in the effort to slow the pace of global warming.
Across two weeks of negotiations, one of the major issues under discussion was the use of coal as an energy source.
Some coal-dependent nations including India and China argued for a “phase down” rather than a total “phase out” of coal power in the final agreement. Meanwhile, U.S. envoy John Kerry predicted in an interview that the U.S. would eliminate coal by 2030.
Coal is one of the cheapest energy sources available in the U.S., in part because the U.S. houses a large portion of the world’s coal reserves. But coal also has other environmental and social downsides that have made it a less desirable fuel source.
Mining and burning coal heavily emit greenhouse gases like carbon dioxide and methane and also poses risks of air and water pollution. Many policymakers and environmental advocates are now pushing for a transition away from coal for that reason.
Until recently, however, cost won out, and inexpensive coal was the predominant fuel source in the U.S. Coal accounted for more than half of electricity generation in the U.S. until 2003.
Since then, dependence on coal has plummeted and currently accounts for only 19.3% of the total electricity generated in the U.S. The swift decline in coal is partly because other, cleaner energy sources have become less expensive.
Natural gas has seen a major boom over the last two decades as techniques like hydraulic fracturing and horizontal drilling made it easier to extract. Renewable sources like wind and solar have also become less expensive and more widely adopted in recent years thanks to government investment and technological advances.
As a result, the share of electricity generated from renewables has risen by two-thirds since 1990.
Some states that have traditionally relied on coal both as an economic driver and as an energy source have been slower to make the transition.
The majority of coal production in the U.S. is contained in a handful of states, including Wyoming and West Virginia, and because coal is cheap and plentiful, these heavy coal producers are also among the states that generate the greatest share of electricity from coal and a lower share from renewables.
In contrast, the states that depend more heavily on renewables either have governments that have prioritized clean energy and emissions reductions or geographic features that make them well-suited to wind, solar, or hydropower installations.
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The data used in this analysis is from the U.S. Energy Information Administration.
To determine the states most dependent on coal for electricity, researchers at Commodity.com calculated the share of total electricity generated from coal. In the event of a tie, the state with the greater total electricity generated from coal was ranked higher.
Researchers also calculated the total and proportion of electricity generated from renewable sources. Renewable sources include solar, wind, geothermal, biomass, and hydroelectric.
Here are the states most dependent on coal for electricity.
The Most Coal-Dependent States in the U.S.
15. Arkansas
- Share of electricity generated from coal: 28.2%
- 5-year change in electricity generated from coal: -29.1%
- Total electricity generated from coal (MWh): 15,420,998
- Share of electricity generated from renewables: 10.5%
- Total electricity generated from renewables (MWh): 5,735,702
14. Kansas
- Share of electricity generated from coal: 31.1%
- 5-year change in electricity generated from coal: -31.0%
- Total electricity generated from coal (MWh): 16,959,839
- Share of electricity generated from renewables: 44.2%
- Total electricity generated from renewables (MWh): 24,117,519
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13. Colorado
- Share of electricity generated from coal: 36.0%
- 5-year change in electricity generated from coal: -38.2%
- Total electricity generated from coal (MWh): 19,478,405
- Share of electricity generated from renewables: 30.9%
- Total electricity generated from renewables (MWh): 16,724,964
12. Montana
- Share of electricity generated from coal: 36.4%
- 5-year change in electricity generated from coal: -47.0%
- Total electricity generated from coal (MWh): 8,490,284
- Share of electricity generated from renewables: 59.4%
- Total electricity generated from renewables (MWh): 13,872,119
11. Ohio
- Share of electricity generated from coal: 37.2%
- 5-year change in electricity generated from coal: -37.2%
- Total electricity generated from coal (MWh): 45,008,596
- Share of electricity generated from renewables: 2.9%
- Total electricity generated from renewables (MWh): 3,500,737
10. New Mexico
- Share of electricity generated from coal: 37.5%
- 5-year change in electricity generated from coal: -37.4%
- Total electricity generated from coal (MWh): 12,788,184
- Share of electricity generated from renewables: 27.2%
- Total electricity generated from renewables (MWh): 9,253,738
9. Wisconsin
- Share of electricity generated from coal: 38.7%
- 5-year change in electricity generated from coal: -36.1%
- Total electricity generated from coal (MWh): 23,761,097
- Share of electricity generated from renewables: 9.4%
- Total electricity generated from renewables (MWh): 5,779,793
8. Nebraska
- Share of electricity generated from coal: 51.0%
- 5-year change in electricity generated from coal: -22.3%
- Total electricity generated from coal (MWh): 18,788,647
- Share of electricity generated from renewables: 28.9%
- Total electricity generated from renewables (MWh): 10,648,740
7. Indiana
- Share of electricity generated from coal: 53.1%
- 5-year change in electricity generated from coal: -38.9%
- Total electricity generated from coal (MWh): 47,772,885
- Share of electricity generated from renewables: 8.2%
- Total electricity generated from renewables (MWh): 7,364,544
6. North Dakota
- Share of electricity generated from coal: 58.1%
- 5-year change in electricity generated from coal: -11.7%
- Total electricity generated from coal (MWh): 24,496,807
- Share of electricity generated from renewables: 38.1%
- Total electricity generated from renewables (MWh): 16,084,768
5. Utah
- Share of electricity generated from coal: 61.5%
- 5-year change in electricity generated from coal: -28.0%
- Total electricity generated from coal (MWh): 22,806,021
- Share of electricity generated from renewables: 12.5%
- Total electricity generated from renewables (MWh): 4,644,687
4. Kentucky
- Share of electricity generated from coal: 68.7%
- 5-year change in electricity generated from coal: -39.9%
- Total electricity generated from coal (MWh): 43,638,313
- Share of electricity generated from renewables: 8.5%
- Total electricity generated from renewables (MWh): 5,395,636
3. Missouri
- Share of electricity generated from coal: 71.3%
- 5-year change in electricity generated from coal: -20.8%
- Total electricity generated from coal (MWh): 51,755,690
- Share of electricity generated from renewables: 7.5%
- Total electricity generated from renewables (MWh): 5,450,572
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2. Wyoming
- Share of electricity generated from coal: 79.4%
- 5-year change in electricity generated from coal: -22.6%
- Total electricity generated from coal (MWh): 33,359,104
- Share of electricity generated from renewables: 16.1%
- Total electricity generated from renewables (MWh): 6,763,997
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1. West Virginia
- Share of electricity generated from coal: 88.6%
- 5-year change in electricity generated from coal: -26.2%
- Total electricity generated from coal (MWh): 50,216,398
- Share of electricity generated from renewables: 6.2%
- Total electricity generated from renewables (MWh): 3,496,285
Detailed Findings & Methodology
The data used in this analysis is from the U.S. Energy Information Administration’s Electricity Power Data.
To determine the states most dependent on coal for electricity, researchers calculated the share of total electricity generated from coal. Only states with complete data available are included in the analysis.
In the event of a tie, the state with the greater total electricity generated from coal was ranked higher.
Researchers also calculated the total and proportion of electricity generated from renewable sources. Renewable sources include solar, wind, geothermal, biomass, and hydroelectric.
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