Wyoming produces more coal by far than any other state: more than 317 million tons in 2017, according to the federal Energy Information Administration. Earlier this year, an internal study by Rocky Mountain Power, the state's largest electricity supplier, found that closing four money -losing coal-fired power plants and replacing them with renewable energy bought on the open market could save ratepayers in Wyoming and neighboring states more than $248 million.

In response, the state legislature passed a bill to force any utility that plans to close a coal plant to try first to sell it to a new operator. The utility would then have to buy back the power and pass the costs through to its ratepayers. Republican Gov. Mark Gordon signed the bill, despite an analysis by University of Wyoming economist Jason Shogrenshowing that the only way any utility could run Rocky Mountain Power's plants more cheaply would be to “cut corners on environmental cleanup or slash worker benefits.” Similar legislation in Montana failed.

In Ohio, state lawmakers are considering legislation to bail out two money-losing coal plants by charging customers a monthly surcharge that would total $60 million a year. That proposal is included in a bill to give a much larger bailout to two aging nuclear power plants , which would also cut back state mandates on renewable energy and energy efficiency.

Here are some other state schemes for propping up the coal industry:

Last month, West Virginia reduced the coal severance tax from 5 percent to 3 percent, and gave coal companies a tax rebate for buying equipment to expand their mines. The state is expected to lose more than $60 million annually in taxes beginning in 2021, when the tax is fully implemented, according to the state's Tax and Revenue Department.

Last year, Kentucky lawmakers adopted legislation to prohibit federally certified radiologists from diagnosing black lung diseaseusing X-rays. Legislation was filed the same year that a federally certified physician found the “biggest cluster ever” of black lung disease in central Appalachia. Most diagnoses will now be made by physicians employed by the coal industry, which will have the effect of lessening the financial burden of black lung payouts for mining companies.

Utah passed legislation last year that appropriated $1.65 million to file suit against California for its policies reducing greenhouse gas emissions, which make it more expensive for California utilities to purchase energy from Utah's coal plants. Apparently, Utah has yet to file suit and would likely not succeed, since oil companies have already failed in attempts to sue California for its policies.

These attempts to save the coal industry at taxpayers' expense are futile. As Shogren, the Wyoming economist, wrote in a Casper Star-Tribune commentary about the Rocky Mountain Power bill:

The energy market has changed and no one person or legislature can change it back. . . . Coal communities need and deserve help. That means embracing our state's immense potential to generate wind and solar power, finding ways to use coal for profitable materials, and providing transition funding for displaced workers. But a bill that claims to “save coal” by charging energy customers more, slashing worker benefits, and preventing cleanup of land and water is not the answer.