

There have been some recent advances on hydrogen production. I don’t think this (sorry for the MSN link) is the one I heard of, but is an interesting example where cheaper catalysts are improving the efficiency of hydrogen production.
Now, I don’t know if or when hydrogen will be more cost-effective than batteries, which are also experiencing massive advances. This is why I’m going to take the comment someone on Lemmy made about buying used EVs for the next little while - it’s cheaper, they’re lasting longer than predicted, and the advances lined up for the next few years are significant.
Even solids are mostly nothing. This is why neutron stars are so dense - there is a lot less nothing between the neutrons, largely due to gravity.
Here’s another way to think about it. A gas is like a bunch of balls bouncing around a room, hitting the walls and occasionally each other. A solid is like a ball pit, but the balls are vibrating. There is still a lot of bouncing, but most of themstay together.