"Project in Estonia will convert former Union Pacific locomotives to run on LNG"

"The conversion, which will likely cost $300,000 per loco, will produce a hybrid able..." (Fender, 2021)

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References:

Fender, Keith. (2021, February 10). Project in Estonia will convert former Union Pacific locomotives to run on LNG. Retrieved from Trains: https://trn.trains.com/news/news-wire/2021/02/10-project-in-estonia-will-convert-former-union-pacific-locomotives-to-run-on-lng