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With its midyear recovery already in doubt, the American steel industry now has a little more to worry about with each passing day a strike drags on at General Motors Co.

U.S. Steel Corp. said it expects to report a wider loss than analysts were expecting, the third American steelmaker in three days to warn on their outlook. The shares fell.

Steel could shed its reputation as a climate threat by using hydrogen instead of fossil fuels for as much as half of global output by 2050, according to BloombergNEF.