
Railroads transport goods extremely efficiently, especially in terms of fuel and greenhouse gas emissions. But most locomotives still run on fossil fuels.
Use of cleaner alternatives such as battery-electric or hydrogen requires new locomotives. However, diesel-powered locomotives can be retrofitted to run on natural gas, enabling companies to more cost-effectively reduce GHG emissions without having to retire locomotives that have years of useful life left.
Challenges of natural gas for railStori...
https://www.freightwaves.com/news/is-compressed-natural-gas-finally-feasible-for-railroad-applications