When the bus's fuel processing system converts methanol to hydrogen, it also produces carbon dioxide, but at lower levels than diesel engines.
But that in turn can still lead to damage to the environment in processing the fuel.
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The plan envisages Iran's low-enriched uranium being shipped overseas for processing into fuel.
Mining more coal for shipment to coal-to-liquid processing plants and fuel customers would reverse the slide, potentially welcome news for shareholders of Burlington Northern, Norfolk Southern and other rail companies.
Mining more coal for shipment to coal-to-liquid processing plants and fuel customers would reverse the slide, potentially welcome news for shareholders of Burlington Northern, Norfolk Southern (nyse: NSC - news - people ) and other rail companies.
In addition, there will need to be access to large sources of energy to keep the ponds from freezing in cold winter climate areas, and for processing the algae into fuel.
He also said the government is pushing ahead with Rokkasho as part of a national energy policy that seeks to reduce overall plutonium stockpiles by processing them into the fuel to power reactors.
The two other possibilities, which were ruled out, were on-island heat treatment - in an incinerator, gasification or pyrolysis plant - or a further stage of processing to produce a fuel product, which would also be shipped off-island.
T. which takes account of the carbon emissions incurred in the growing and harvesting of the crop, including land-clearance, its processing and the CO2 that results from final combustion of the fuel.
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"Because all the food in our supermarket will be grown on site we won't need a big processing factory to make packaging and we won't have to burn lots of fossil fuel to transport it across the globe, " he said.
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