Railroads Are Running Dirty Diesel Trains Through Communities and No One Is Doing Anything About It
Union of Concerned Scientists
JUNE 17, 2025
After slowing new purchases during the Great Recession, railroads bought a large volume of new locomotives, both to replace aging stock and to avoid stronger pollution controls. Beginning in 2001, emissions regulations were phased in for newly built locomotive engines, along with requirements for rebuilt engines.
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