I’m not sure what to make of this. A team in the US has announced that they are about to build a carbon neutral locomotive that will use a biomass coal-like material. Essentially they will be taking a loco from the 19030s, make the necessary modifications and use the bio-coal as the fuel.
MINNEAPOLIS / ST. PAUL (05/22/2012) —Plans to create the world’s first carbon-neutral higher-speed locomotive were announced today by the Coalition for Sustainable Rail (CSR), a collaboration of the University of Minnesota’s Institute on the Environment (IonE) and the nonprofit Sustainable Rail International (SRI). CSR draws on the carbon-neutral solid biofuel research expertise of the University of Minnesota and the modern steam mechanical engineering capabilities of SRI to develop the most powerful carbon-neutral locomotive to date.