I drove 1800 miles in a Hydrogen Car

I know I’m WAY behind the curve, but I just discovered your videos (they’re great by the way).  
What is the carbon footprint for these vehicles?  Battery electric vehicles can take up to 95k miles before their footprint comes down to that of an gas/diesel vehicle.  This is because of the production and disposal of the batteries, and the cost of electrical generation for recharging.
So is there an estimate for the cost of  production of hydrogen (is it power intensive like battery production)?