So hydrogen isn't popular in cars because of some conspiracy theory, and not the blatantly obvious fact that it takes much more electricity to separate hydrogen from water, super-cool that hydrogen for transport, and turn that hydrogen back to electricity in a fuel cell, than to just transmit the electricity to a battery.

No conspiracy, hydrogen is slowly getting acceptance because people can't charge their BEVs at home (50% of people in EU lives in apartments) and does not want to wait hours in a queue for public DC chargers.

Simply hydrogen will more expensive, but convenient. And people LOVES to pay for convenience. Just look at Apple.

The easier solution for this is PV roofs for cars. People living apartments also have lower mobility needs.

People in apartments often live in places where there isn't a lot of sun.

Apartment >= 2 Floors, Building >= 2 Floors creates shade.

Does it need to be a conspiracy theory though ? I don’t think it’s required.

I mean smoking is bad for people, smoking is good ads happened but it want a conspiracy ?