Electric con trick

electric cars are the future but while our power is mostly  generated by fossil fuel were kidding  ourselves they're green. What we really need is solar power and fuel cell powered cars. The only need water/hydrogen for fuel. Solar power can make hydrogen during daylight supplemented by a dose of hydrogen when needed. The  fuel cells convert it to power giving off water. No pollution.  When we switch to electric what's HMG going to do to fill the blackhole in its fuel duty?