Hydrogen powered cars=more rain?

The theory of hydrogen powered cars has just as many shortcomings as it does positive aspects in my oppinion. However, a HUGE benefit is that the car is said to emit pure H2O from the exhaust. In theory this sounds great, but would one hundred million american hydrogen powered cars casue and overabundance of rainfall?? Would every day be grayer due to over new water emissions and plants have a harder time thriving? I do not actually know the amount of water vapor that would be coming out of the system but i think it has a possibility of messing with our delicate ecosystem.

9 Answers

  • 9 years ago
    Best Answer

    the amount of water released to the atmosphere from ocean, lake, and stream evaporation, plant transpiration, and all combustion(except pure carbon burning), vastly outweighs whatever hydrogen vehicles will emit, ever.

    if anybody claims to be able to measure it, you can safely call him or her a liar.

  • 9 years ago

    Assuming that you are talking about a fuel cell where combustion does not take place and NOX is not a by product (1) you might compare the water vapor produced by a fuel cell electric car and a gasoline burning ICE. Government data says that these are about on a par: http://www1.eere.energy.gov/hydrogenandfuelcells/d... While burning gasoline puts out about as much water vapor as carbon of greater concern should be the burning of the "clean fuel" natural gas which puts out twice the water vapor: CH4 + 2O2 → CO2 + 2H2O (2)

    How potent a greenhouse gas may be is only one consideration. Another is how long it tends to stay in the atmosphere.3 Water vapor if very dependent upon temperature. The cooler it gets the less water vapor that can be held in the atmosphere. The converse is also true. Pockets of weather or micro-climates will increase or decrease water vapor. So water vapor may be very short lived in the air. By comparison methane has a life of about 6 years in the air and CO2 can remain for many decades.

    But in all cases it is important to consider that "The water vapor doesn’t necessarily have to come out of the tailpipes of the vehicles. The water vapor can be recycled and run through the fuel cell again and it also can be collected for disposal as liquid water later." http://www.hydrogencarsnow.com/blog2/index.php/hyd...


    Source(s): --------------------------- 1 It is significant that not every concept or prototype vehicle fueled with hydrogen is the same. Some use an ICE (internal combustion engine) and some use a fuel cell. Where hydrogen is combusted in an ICE water is not the only by product. Air compressed and exposed to ignition in an ICE is the major source of NOX emissions regardless of the fuel. The problem is with the engine not the fuel. 2 On water vapor and clouds: http://www.sjsu.edu/faculty/watkins/watervapor01.h... 3 Length of time in the atmosphere makes a difference: http://www.ucsusa.org/publications/earthwise/fuel-... Greenhouse gases: http://www.ncdc.noaa.gov/oa/climate/gases.html Water vapor as a greenhouse gas: http://www.skepticalscience.com/water-vapor-greenh... http://www.hydrogencarsnow.com/blog2/index.php/hyd...
  • 9 years ago

    Edward, I don't know if you were being serious or trying to be funny, but if widespread hydrogen fueling stations were built, they'd require more gas station attendants - people won't be trusted to fueld their cars with high pressure hydrogen themselves.

    But it doesn't matter, there won't be any widespread hyrdrogen fueling stations since hydrogen isn't really a fuel, it's an energy storage medium. There are no large hydrogen deposits waiting to be tapped, hydrogen would have to be extracted from existing fossil fuels or from water or something, and all of those processes are energy intensive (and that energy is not gained back when you burn the hydrogen).

    if you're going to use all of that energy extracting hydrogen, then you may as well just make electricity and use the existing power grid to distribute it to end users.

  • 9 years ago

    You have raised a truly hypothetical question . Emission of H2O from the cars you say will cause rains. Why ? Cars will not stand still and emit H2O and flood your area with pure water . Why do you ignore the warming effect caused due to energy and Carbon emission and that the H2O may counter such emission ?

    Let us think positively. Let us weigh the merits and demerits first and then predict things.

    Source(s): Personal opinion
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  • Peter
    Lv 6
    9 years ago

    Interesting point since water vapor is 100 times more potent as a green house than CO2. So if man is really affection the climate because of all the CO2 from cars wouldn't changing that to H2O be 100 times worse? On the upside reality says that 100 x nothing (which is what AGW is) is still nothing.

  • 9 years ago

    Hydrogen powered cars NOT= more rain.

    Hydrogen powered cars = CO2 free rain.

    The H2O would only replace the amount of CO2 that a fossil fuel car would have created.

  • Bob
    Lv 6
    9 years ago

    Well if you live in an area with high humidity normally you probably won't notice the difference. The air can only hold so much water. If you live in the desert you will still have sunny days that will just feel hotter because of an increase in the humidity.

  • 9 years ago

    hydrogen cars already exist. they won't hit the street until we find jobs for all the gas station attendants they would put out of work

  • 9 years ago

    What, don't you know H2O is a product of gasoline combustion too?

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