For aviation, e-fuels could be a thing, but you still get particulates etc, its not clean to burn stuff

Quick review of the Neoplants, doesn't filter particulate so unfortunately that's a big part of avoiding allergic reactions.. Seems like a fun thing to add to your home!

On the 'Monday Morning Engineering', even engineers do that to themselves, but they also have a need to wrap up a project unless it is just a research effort. Hydrogen also has a bad storage problem. It is VERY hard to keep it enclosed and if you do it in a steel, then steel works its way through steel due to it be so SMALL a molicule ( H2 as a molicule is different than the monoatomic hydrogen that doesn't allow). On e-fuels it appears to be energy inefficient, not that it can't or should not be done. It is not really entropy neutral as proposed.

I still feel biofuels have a place to play. All kerosene heaters can use biodiesel, that's a massive adaptation that doesn't need new infrastructure. Methanol and ethanol are a form of hydrogen storage with a shelf life of years and when run in a fuel cell make about 4.3 kWh/liter. Alongside seasteading and farming algae in the ocean scaling production becomes much more viable.

Energy storage and long-haul heavy trucking - for the same reasons as the hospital case. You can have a 1000 mile range truck that weighs significantly less than an equivalent battery powered truck. I think those are the two areas where hydrogen will be essential to the “green” future

Aluminum cartridge fuel for cars...I thought these would take off. Mainly for the ease of use. Pop it out and another one in, go to the store and get some more. Having a spare in the car to overcome range anxiety. It seems to have disappeared unfortunately.

The petrochemical industry is desperate to continue to profit from energy sales. I generally feel voices who promote hydrogen as a solution to climate change are from that industry or allied.

Would love to see if yall could get a update on Plama Kinetics and their deals.

hydrogen might work well far agriculture since farmers could produce it from excess solar, and it wouldn’t have to be transported that far.

Hydrogen is little as Nuclear. It is a lot of energy, but with that it is dangerous. In right place and handled it is great, but not always.

Is the problem created demonstrably better than our current problem: switching to nuclear power. Yes, there are downsides to nuclear. And man some of them can be terrible, but could a nuclear plants replace all the coal burning plants and the US could eliminate something like 30% of our total carbon footprint. That would have a huge impact and if we work hard to put systems in place to make it safe, we could avoid some of the terrible downsides and only be left with finding a way to dispose of nuclear waste. We're one of the largest carbon emitters and finding a way to decrease that is very important and getting to be very urgent.

What are your thoughts on hydrogen being more dangerous to the atmosphere than CO²? Are there any stats on what percentage H² actually makes it from where it's made to where its consumed?

Is it possible to charge a plane or a boat via wireless, I thought there was a group ising space solar to transmit power to a ground station

Talking about intertwined tec, take a heat source (solar, wind, nuclear, termo electric, geo thermal etc) boil sea water for desalination, bryne can be concentrated enough for mining, clean steam send it through a pipe to a gigantic tower ( Taipei 101 style to resist the elements and quakes) naturally condens the steam at the top than send the water as far as elevation allows via gravitational feed. You can cultivate edible Jatropha Curcans that grows in poor even salty soil with as little as 5 cm of rain in a year. Take the oil for biodiesel, give the spent nuts as animal feed, use animal excrement for methane generation or mushroom cultivation than the spent excrement becomes fertilizer for the Jatropha and this way you can create jobs and feed people in some very problematic regions. The water towers can be used as relays as well to extend the dispersion area of the water like a modern version of Roman aqueducts.