Suppose cars of the future only exhaust water...?

Question

Would the areas in and around major cities more rainy? Will New York become the rainiest city in America? All that extra water vapor will have to go somewhere.

Answer 1

The exhaust from your car--the one you're driving right now--consists mainly of water vapor.  It also contains some carbon dioxide and some other stuff, but mostly it's water vapor.  Ever see a tailpipe drip water when the car is cold?  That's where it's coming from.  

Hydrocarbon = hydrogen + carbon

add oxygen to both to get hydrogen + oxygen = water and

carbon + oxygen = carbon dioxide.  

Answer 2

Rain, dew.  New York would still have mass transit to keep it from being as wet.  

Answer 3

Yeah, that would mean more water vapor in the air, and eventually clouds.  But clouds would blow with the wind.  What you'd probably see is dense cities become more humid, and a very slight increase in rainfall around the world.

Answer 4

water is the real greenhouse gas - infinitely more effective then CO2.  I love to hear the hype about "clean" automobiles.  Vehicles that only create water. water vapor has a much, much higher heat capacity coefficient then CO2.  If CO2 heats the planet the way people say it does, then wait until "clean" vehicles are in the majority... wonder if water will become a pollutant???