Replacing the internal combustion engine with hydrogen fuel cells right? But where will the hydrogen come from?

I used BP statistics to estimate oil-equivalent energy consumption for North America (including Canada, USA & Mexico), and it turns out that we would have to electrolyze 15,593 gallons of water per second to generate sufficient hydrogen to replace fossil fuel consumption in North America. This would require a 1.2 terawatt industrial electrolysis plant working at 66% efficiency. Additional energy would be needed to convert the hydrogen into a liquid sodium borohydride fuel with lots of efficiency factors still to be accounted for. Cumulatively the entire electrical generating capacity of Planet Earth is only 3 terawatts. This includes all nuclear, hydroelectric, diesel, gas, geothermal, wind & solar power plants. Clearly a great deal of energy conservation technology needs to be applied in the area of transportation, otherwise a hydrogen infrastructure will in fact result in a massive INCREASE in energy consumption, pollution, nuclear & toxic waste, etc.

That's the real solution: conservation. If we do convert to hydrogen then we should concentrate on infrastructure for the transport of goods (food, raw materials) such as farm equipment, mining equipment, locomotives, ships, public transit - the "first ones" of transportation. After that we can find solutions for tractor-trailors, cars & trucks, which may not be cost effective to convert to hydrogen. Hydrogen will be in short supply.

Options for efficient personal transport:
- walking or running
- bicycles
- motorbikes or other small ultra-efficient vehicles

While essential transportation converts to hydrogen, oil shortages may also cause personal transportation vehicles to get smaller and smaller, and thereby more fuel efficient. To keep energy consumption from getting out of control, and our streets from being choked with millions of bikes and scooters like Chinese cities, I think we should seriously consider a cap on population. Immigrants, including refugees, would simply not be allowed if their presence causes the population to rise by one. That is a policy of questionable ethics, therefore we should educate our population on the problem of energy, and then create legislation that makes immigration completely dependant on energy quotas.