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OMAHA, Neb. (AP) — The major freight railroads across North America continue to experiment with alternative locomotive fuels as a way to reduce their greenhouse gas emissions.

BNSF railroad said Wednesday that it plans to test out a hydrogen-powered locomotive along its lines, joining Canadian Pacific in experimenting with that technology. Canadian National railroad recently announced plans to test out a battery-powered locomotive to haul freight across Pennsylvania, and Union Pacific has said it would like to try using battery-powered locomotives in some of its railyards once they are more widely available in a few years.