Union Pacific will spend more than $1 billion to upgrade 600 of its old diesel locomotives over the next three years and make them more efficient, but regulators still want it to do more to cut pollution from its engines.
The move will accelerate the pace of upgrades UP already planned to make and help the Omaha, Nebraska-based railroad cut roughly 210,000 tons of carbon emissions each year -- the equivalent of taking 45,000 cars off the road. The railroad will go from modernizing 120 locomotives this year to modernizing 200 a year in each of the next three years.
