| 21. | Newer types of fuel cells use other materials as the electrolyte.
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| 22. | Malfunctioning fuel cells nearly forced the early end of the mission.
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| 23. | Every major automaker in the world is feverishly researching fuel cells.
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| 24. | Utility companies are working to make giant fuel cells commercially productive.
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| 25. | In recent years, the cost of fuel cells has dropped sharply.
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| 26. | The hybrid vehicles are a stepping stone to the fuel cell.
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| 27. | Fuel Cells 2000 Executive Director Robert Rose said in a statement.
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| 28. | And others have already put fuel cells in cars and submarines.
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| 29. | In 2006 Australian Ceramic Fuel Cells Ltd settled at the site.
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| 30. | Microbial fuel cells finally allow the generation of electricity from biomass.
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