Almost everything burns. Grapes have a lot of water in them, which is why they are so juicy. Things that have a lot of water are hard to burn, because water does not burn. But if you burn something wet for long enough, the water evaporates and then the thing will burn. So with grapes, you have to heat them until the water evaporates, and then they burn the same way something like cloth or wood would burn.

Fair point, but if we stopped being stupid and just went full send on nuclear/wind/solar/hydro/geothermal etc then we could probably call a 25% energy loss a write off, considering we could do away with needing to produce batteries and would essentially have infinite energy. We’re just missing a couple improvements to generation efficiency/transport/storage of hydrogen but it could be pretty cool.

I always thought hydrogen power had potential, but not as an energy source. More like a replacement for batteries. (E.g. make a shitload of energy using nuclear, use some of that to make hydrogen. Now you have a transportable energy source that burns into water, yay)