I don't know much about chemistry, but I'm guessing that after the water has been split into hydrogen and oxygen and had the hydrogen converted to electricity, there probably isn't that much water left.

Just like celebrities happily perform in front of the most oppressive of despots, car companies will sell to anyone. At least car companies aren't lecturing us about how we should be living our lives while legitimizing some dictator for a few extra hundred thousand dollars.

One idea I've pondered was "CNC casting". Where a foundry can do small batch castings by having a CNC machine carve the packed sand rather than having to make up forms. It would be useful for a small volume operation that would be followed by CNC. For example: A race team wants to build a custom engine. Instead of…

Drive comes to mind.