Expect to go away in the future, the same way steel did and coal:
Steel production in the United States peaked at 111.4 million tons in 1973, and declined slightly to 97.9 million tons in 1978. ... Although the bulk of job losses occurred in the 1974-1986 period,
steel employment would continue to decline for decades, reaching just 142,000 jobs in 2015.
Steel crisis - Wikipedia
en.wikipedia.org › wiki › Steel_crisis
and
In 2018,
coal mining decreased to 755 million short tons, and
American coal consumption reached its lowest point in nearly 40 years. ... In 2016,
US coal mining declined to 728.2 million short tons, down 37 percent from the peak
production of 1,172 million tons in 2008.
Coal mining in the United States - Wikipedia