Just a hint, per the illustration, it IS NOT a good idea to have hydrogen tanks next to oxygen tanks. Waiting for the Earth shattering Kaboom!
I noticed the oxygen tanks, too - but wasn't bothered so much by possible safety issues as I was by the fact that THERE IS PLENTY OF FREE O2 IN THE ATMOSPHERE!
Unless you are delivering pure O2 to an Emphysema patient, or using it as an oxidant in a Space Shuttle, there is little reason to store it in pressurized tanks and/or shlepp it around with you. Rather, it would be easier to simply use air from the environment. Liquid oxygen is expensive!
For the combustion of hydrogen to generate energy (to, e.g., power a fuel cell, or propel a motor vehicle), atmospheric oxygen would do just fine - the 78% (relatively inert) nitrogen present in it would not overly interfere with the chemical reaction. Unless you were trying to demonstrate some "proof-of-concept" and attain a fantastically high efficiency rate, plain ol' air is just fine for most applications.
I'm not a chemist, folks, so please feel free to disabuse me of any cockeyed notions I might be propagating here! The above image may have simply been a stock photo of oxygen tanks next to hydrogen tanks they wanted to use to catch the reader's eye and/or serve as a "lead-in."
Regards,