interview > greene > greene 7
Greene 7 (2:06)
Topic(s): Biofuels / Future Transport / Hydrogen
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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
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.