Water Shortage, Global Warming, and Hydrogen cars

It always amazes me at the stupidity of academics, people that have attended college and some inventors.  They are always telling us of a shortage of water and they want cars to run on water, doesn't really make sense to me.  Just like the methanol debacle, now our food prices went up and there is a shortage of food because they are making gas.

But they I thought maybe making cars that run on water could render the supposed global warming catastrophes moot.  If they are able to use water from the ocean to run cars then when if the oceans rise as they claim we can just use all that water in our cars and we will all be fat, dumb, and happy!

But please don't be scared!