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Greene 7 (2:06)
Topic(s): Biofuels / Future Transport / Hydrogen
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Greene

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Well, hydrogen, I think, is a very interesting long-term technology and hydrogen vehicles are not anywhere near ready for the market yet. They're too expensive, the fuel cells are not durable enough, and of course we have problems of how do you store sufficient amount of hydrogen on board the vehicle. So I don't think, in the next 10 or 15 years, we're going to see any significant impact of hydrogen on the transportation system.

But there's been a lot of progress in the technology over the past decade or so and it is one of the few options available, electricity is probably the other, where we could have clean energy for transportation and the quantities of energy we need for transportation because hydrogen can be produced from many, many different sources. We can produce it by dissociating water by electrolysis, but right now that's quite expensive. We can produce it by gasifying coal and capturing the hydrogen. We can produce it from natural gas. We can produce it from biomass. You can even use nuclear energy and thermal processes to dissociate hydrogen and oxygen in water and produce hydrogen that way. So there're many, many ways to produce it, and there's no shortage of water from which to make this hydrogen or, you know, materials containing hydrogen.

So hydrogen has a lot of potential, but it also has very serious technological challenges on the one hand to overcome, and it also has this problem that it's a completely novel energy system. And we would have to replace all of the infrastructure on the fuel supply side, essentially. There's nothing useful that we're doing now for hydrogen.

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