They do not use fuel but instead convert energy from the ocean's waves, turning it into forward thrust.
Geothermal power plants do not require fuel, are largely unaffected by weather and use a comparatively small share of the land and freshwater needed for most other energy facilities.
However, once built, these plants do not require fuel, although they will be tied to natural gas fuel costs as gas plants are generally used to buffer the intermittency of wind production, not included in this discussion.
As the Sandy post-mortem analysis turns to talk of resiliency and hardening the electric grid, resources that do not depend on fuel at all deserve a place in the conversation.
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Fossil fuel companies do not take into account the external effect of the cost of pollution or carbon emissions.
Worse, in the most remote places, cash welfare is no use since food and fuel markets do not even exist.
Its lawyers argue that to qualify as a petrol station, you do not really have to sell fuel: serving motorists in other ways will do.
Further, heavy crude oils do not produce as much gasoline or fuel oil as light crude oil.
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Having invested heavily in gas-fired stations, only to find themselves locked into an increasingly expensive fuel, they do not want to make another mistake.
We live in a world that needs alternative forms of energy which are not hydrocarbon based, forms of energy that do not contaminate at every stage of their lifecycle, that do not place benzene and formaldehyde in our air, diesel fuel in our aquifers and more benzene and formaldehyde as we drive our kids to work.
If you can turn natural gas into a high-value fuel, why not do the same with coal, which is even more plentiful in parts of the globe (like the U.S. and China)?
It would also do more to encourage the use of vehicles with flexible-fuel engines to provide American consumers with something they do not have: a real choice.
Pembrokeshire, Blaenau Gwent and Torfaen are also planning MBTs, but have not yet decided what to do with the fuel.
They almost universally do not factor in the other emissions from burning fuel, even though they are more potent, because they exist in much smaller quantities and they also do not persist for centuries as will CO2.
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The firm also warns drivers that they do not accept any responsibility for damage caused by the fuel.
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Equally, McLaren and Mercedes, the other two top teams, do not yet appear to have done similar low-fuel runs to those by Webber and Alonso.
Mr. Gates scrapped much of the Army's multibillion dollar Future Combat Systems, after it became clear that its lighter, faster, more fuel-efficient vehicles would not do much to protect soldiers from the threat of improvised explosive devices.
Ken Cohen, vice president of public and private affairs, explained that not only do they not control oil prices, but also that profit from the sale of gasoline and diesel fuel represents less than 3 cents out of every dollar the company earned.
Despite being powered by fuel created from sewage, the vans do not smell unpleasant.
Fuel cells offer several advantages: they do not have moving parts and there is no burning involved, so there are negligible emissions of environmentally harmful gases like nitrogen, sulfur oxide and carbon monoxide.
It also said that while it did not plan to do any more work on the national fuel market, it might still take action in some local markets if there was "persuasive evidence of anti-competitive behaviour".
But you know what, after three decades of not doing anything, we got together with the oil companies, we got together with the unions, we got together with folks who usually do not see eye to eye, and we negotiated new fuel economy standards that are going to make sure our cars average nearly 55 miles per gallon by the middle of the next decade.
The fuel for your limo, yacht and private jet do not come without a price beyond what you pay at the pump.
The standards also do not require specific technologies, but instead allow automakers to meet their fuel efficiency and greenhouse gas targets however they choose.
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This nitrogen also bears the isotopic fingerprint of nitrogen derived through the inorganic processes of fertiliser manufacture and fossil fuel burning, and not of the way microbes do it.
Yet, environmental groups will argue, he cut VAT unilaterally on products designed to help people stop smoking, so why not do the same on products designed to help people reduce fossil fuel burning?
And fuel cells are more efficient than internal combustion engines because they do not create as much unused heat.
Also, a consumption tax of 15 percent would not be moderate, nor, very likely, would it do anything but fuel greater spending while doing nothing to reduce debt.
This means they do not have to carry liquid oxygen (or some other oxidant) to burn their fuel, and could thus use the weight saved to carry a bigger payload.
The priority is, as it has been all along, to restore adequate coolant to the fuel ponds and the reactors themselves - while hoping that earthquake aftershocks and bad weather do not hamper operations any more.
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