The problem with hydrogen is it requires a ton of electricity to produce cleanly. Most hydrogen today is produced using hydrocarbons which obviously just shifting carbon from fuel to production. If you want clean hydrogen it will need to be produced by nuclear plants. Hydrogen is also difficult to store as it must be contained under pressure and is highly explosive.

I think we should skip hydrogen as a storage medium and just skip right to electric vehicles.

They are already using this to put snipers into flow so they perform better.

Check out RadioLabs 9v nirvana.

I have a feeling that the hygiene hypothesis may have something to do with this. I read a recent abstract that said eczema had been increasing over the decades and they attribute it to small families and less cross contamination leading to more exposure to pathogens. Wonder if the same is for acne.