Water X Oil

This is just an exercise...

Hydrogen Cells do exist.
They are expensive.
They make expensive cars.
Right.
So.
Produce big percentage of these cars, equals reducing Cell prices.
Equals less combustion engines at work, therefore less pollution and most of all, decrease interest in Oil.
Equals, abandoning oil production, less worries bout Oil producing countries.
Less Oil demand, less interest and value for Oil.
Equals, Clean Air.
Equals Oil Wars Over.
................
Could this be feasible ????
Think so.