"Zero-Emission Locomotives on U.S. Railways?"

"Typically, long before standards change, locomotive factories design and manufacture prototype locomotives that meet the requirements of..." (Luvishis, 2021)

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References:

Luvishis, Alex. (2021, February 17). Zero-Emission Locomotives on U.S. Railways?. Retrieved from Railway Age:  https://www.railwayage.com/mechanical/zero-emission-locomotives-on-u-s-railways/?RAchannel=mechanical