A blond environmentalist question........?

Question

If you believe that Oil and its uses in the combustiable engine,are creating the green house gas carbon Monoxide,and dioxide,changing the atmosphere,then.....

Wouldnt fuel cell motors(hydrogen fuel) ,that expell water vapor,the most abundant greenhouse gas be worse and eventually change the dynamics of the planet into a wetter more tropical type world.(imagine if everyone was driving a fuel cell vehicle right now,what would be the consequences from the extra water being pumped into the emvironment.

Answer 1

Just think of all of the benefits from putting that much moisture in the air.

The more moisture in the air, the more it will rain, and thus supply more water for irrigation and less droughts.

Answer 2

i agree with that person. isnt it like you cant add any more water. whatever h20 is on the earth will always remain the same amount? plus, people around the world could use some extra water.

Answer 3

The hydrogen will come from water that is already in the environment.  You will not be creating any more water.  

You split H2O to hydrogen and oxygen.  You burn hydrogen in the presence of oxygen to create energy and water.  No water lost, no water gained.  

The problem is the huge amount of energy needed to split the hydrogen and oxygen from water.  Where will that energy come from?  It should not come from fossil fuels, which are bad for the environment.  It has to come from renewable energy sources in order to be fully green.

Answer 4

for a short time, yes it would. But then it would rain.

I'm no climatologist, but vapor pressure is a function of temperature.

If the air has too much steam for any given temperature and pressure, it will rain.

Answer 5

<<Wouldn't fuel cell motors(hydrogen fuel) ,that expel water vapor,the most abundant greenhouse gas be worse and eventually change the dynamics of the planet into a wetter more tropical type world.>>

no.  if you made the ocean 5' higher, or 5' lower, that wouldn't change the amount of water in the air.

(actually, it would, because there would be an increase or decrease on the surface area of the ocean, but that's not relevant to this question.)

1.  any hydrogen used in a fuel cell would have to be made by separating it from the oxygen in water, so burning it would simply be restoring water that had already been there some days, weeks, or months ago.

2.  adding water to the air would locally increase the humidity, VERY SLIGHTLY, and thus very slightly increase the amount of rain that fell, or dew that formed.

3.  temperature changes balance / control the amount of water in the atmosphere.  there is not the same natural control for CO2.  (some will say plants do that, but if that was just as true, they we'd not have seen a 40% increase in the amount of CO2 in the atmosphere lately.)

Answer 6

It wouldn't change the amount of water vapor in the air.  The water cycle is a working cycle.  If we take water from oceans (or whatever) and turned it into water vapor, it would just condense and turn into rain, going back down to the oceans.

The difference between using water and fossil fuels, is that we would be using water that is in our biosphere right now; with fossil fuels, the excess carbon in the air hasn't been in the air for millions of years.