government zero emissions targets mean mass transit must go green, too, and train-maker hitachi willng electric engines on this london-to-cornwall route later this year. >> from an engineering organization's perspective, what a challenge-- what a fantastic opportunity to drive towards. >> reporter: jim brewin heads up hitachi's u.k. office. >> and this is why, when government sets targets like that, like we're seeing in the u.k., in japan, in the u.s., these really change how we look at what we need to offer to society through the work that we do, and batteries, the one step forward, and the trials that we're doing here, can be a glal offering. >> reporter: brewin says selecting local suppliers can also decarbonize production, so behind hitachi's worldwide trains, the battery technology will be british, developed here in the old industrial heartland of england's northeast. the new train batteries will rely on the same lithium-ion technology as cars, but with very different power requirements. >> a car has possibly part of one of these battery units, whereas we've got 16 battery unit,