OK... now Sacramento can gloat it has a hydrogen powered train. What's the big deal? It's not pulling cargo. It's a switcher. So... trainyard work. Not really doing much to change the world, or lower emissions on a scale that's noticeable

The locomotive will replace aging diesel switchers statewide, potentially eliminating up to 50,000 gallons of diesel fuel annually, according to industry estimates.

https://www.kcra.com/article/hydrogen-fueled-train-unveiled-west-sacramento/65986830

50,000 gallons a year. What's that good for? About 2 weeks of operating a regular diesel locomotive hauling a full load of cargo across the country, for a round trip, one time?

Not impressively eliminating much... that's the smallest fraction of diesel fuel measurable on an annual nationwide, or even statewide, use. It's about how much a single freight train uses round trip, from coast to coast, one time. There are a LOT more trains in use, all over the state, and the country, than that. We know, because they seem to crash alot, and get into the news

A 16 cylinder EMD uses 130-140 gallons of diesel per hour. All this depends on the amount of weight pulled, and the geography it's rolling over... if that's going uphill at all, it uses more fuel.

So, in 10 hours, about 1500 gallons, so, in 24 hours, about 3600 gallons. 

In 7 days, about 21,000 gallons.