although great achievements are made by man,can fuels be replaced by water...?
143491
Not using present technology, no. Water is an oxidised form of hydrogen. It is chemically very stable and that makes it effectively impossible to extract energy from it.\n\nBy putting a lot of energy into water it is possible to produce hydrogen gas that can later be used as fuel. However that does not make water a fuel source. Far more fuel is needed to produce the hydrogen than is ever recovered when the hydrogen is burned.\n\nIt is concievable at some future date that the development of controllable fusion technology will enable th euse of water as a fuel source, but not until then.
1014128
We need to learn how to conserve our natural resources in order to have them for the future world poplutaion.  Without these resources, such as water, humans cannot survive.
265467
It is likely that the amount of water has increased over time. Water on the planet is considered to be from three sources, chemically separated from rocks, from meteorites, and as part of comets.\n\nHowever, contrary to the beliefs of many who have answered this question there are numerous earth processes that both create and eliminate water. There are sedimentary rocks on the planet that were deposited in water over 4 billion years ago, so it has existed on the earth for a long time. \n\nWe currently consume 83 million barrels of oil every day on the planet, and that oil and natural gas creates large volumes of water vapor from the hydrogen contained in it. In fact, it probably releases a larger volume of water than the volume of the oil since it combines with atmospheric oxygen. Burning coal also releases water.  In the overall volume of water on the planet, this is all probably insignificant. \n\nMany other processes both create and destroy water. Concrete for example chemically incorporates water into its structure when it solidifies. Many rock processes involve incorporation of water into the chemical structure of the rock, and others release water. Minerals such as gypsum are formed by chemical incorporation of water with anhydrite. The water becomes part of the rock. \n\nBiological processes also chemically consume water. Plants incorporate water into their carbohydrate molecules produced during photosynthesis. \n\nOf course, over geologic time most of these processes are cyclical so it is difficult to say if there is a trend in any direction. Most of them are fairly minor in relation to the total volume of water on the planet. \n\nhttp://ga.water.usgs.gov/edu/earthhowmuch.html
1153234
water. it's the creator of life.
433496
Mainly when the automotive ind. decides to earn less money and throw away part of the technology they've been using for about 90 years. But regarding alcohol it is already used in some countries like Brazil, but there is no big difference... we should go for hydrogen or solar... well actually water looks nice but I don't think it'll work.
576695
nobody shud waste water . that is presserve water .  water harvesting which is done wen the rains come can be done as its a good method ..
261005
Apparently groups in Sweden, Australia, and the UK are working on this. There are probably others as well. They are making progress. It does appear that this might allow the industrial scale separation of water into hydrogen and oxygen, and the reduction of atmospheric CO2. \n\n\nRecently, Jim Barber and So Iwata of Imperial College in London identified the actual crucial molecules that are used to split water by plants. This might lead to huge advances eventually. It is quite exciting.
457371
Fuels cells will allow us to creat energy without using fossil fuels and the waste it creates while processing these fuels. By combining oxygen and hydrogen effecitively, energy is created, with virtually no waste. Unlike fossil fuels, there is no limit to the the oxygen and hydrogen that surrounds us. The end result will be cleaner fuel without shortage of supplies and the cost of this will be more affordable to all. Fuel cells are currently being used and tested in space travel by NASA engineers. Fuel cells are the future! A bright one at that!
1141725
Because is just a fake: chemically speaking it is impossible to oxidize water in a combustion engine in order to win energy. Water already is the product of an oxidation. Would be similar, if somebody invent a stove which is run on ash instead of wood.
626745
True. water is essential for the transport of nutrients within them, since it is the "universal solvent".
327281
Water is created by burning hydrogen.
1171447
yes i did know i was watching it on some news clip, its really amazinbg but now its up to the government to stoip fighting for oil, and realize we might have to change for once. And that their gonna have to lose money. Later were gonna fight for water, ALthough who knows cuz the guy who made it said he got 100 miles on 4 oz. of water, thats amazing. which means thats less than what we consume of water a day, now imagine what one cup of water could do? and what will happen to gas stations?
1112176
Not if someone or some country can find a source of energy other than fossil fuels. A source so vast that it cannot be depleted. The history of the world is dominated by search for energy. Pretty soon China or India will come up with an alternate fuel that won't require the burning of fossil fuel. With that event will come the end of corporations that are built around the fossil fuel business. And that will bring about the end of capitalism. It is all about energy and the manipulation of energy.
887688
If you could extract the hydrogen then you could. You'd also be a billionaire!
1128499
Why couldn't someone come up with an engine were you needed only water...I mean the earth is made up of like 70% water.
817151
Water is just a liquid gas isn't it? Hydrogen and Oxygen mixed makes water. That's how.
61416
Yes you could. Free hydrogen (H2) is rare in the atmosphere though, so you would have to buy industrially obtained hydrogen (which mostly comes from natural gas) which is expensive so its always cheaper to drill a water well or something. But yes, if you want to combine oxygen and hydrogen, and light it with a match, you will get water. Good luck trying to contain it after it goes from gas to the combustion product of hydrogen and oxygen, which will be water vapor (steam).