We already have sustainable aviation fuel that is being used in commercial air travel. It's not certain that Hydrogen will ever be safe enough for air travel. Current battery technology isn't good enough in terms of energy density to be used here.

Lots of people are very dismissive about hydrogen technology anyway, based on it being difficult to store and inefficient. Do you have evidence counter to this?

Look, I get it. You don't like what you're seeing, that doesn't mean it's wrong and it's OK to change and adapt when presented with new information.

That's not it at all. Lots of people here on Lemmy like to talk the talk about climate change without actually understanding practical or engineering considerations. It's the same as the socialists and communists who rarely have an economic plan to implement after a revolution.

The future is a mixture of technology that we have, are developing and haven't even thought of.

That's precisely why I don't like you dismissing biofuels out of hand. There are certain applications where batteries just don't work like aviation. I still am not convinced about lithium batteries as lithium is a fairly limited resource, sodium ion seems like the future of batteries for cars and trains, but sodium ion has lower energy density.

I am not saying biofuels will replace electric vehicles or solutions for grid power like nuclear, wind, solar, and so on. Just that they have a place in the larger strategy. People talk about electric vehicles making sense for most situations especially for city dwellers, I am talking about the 20% or whoever remain. This includes car enthusiasts as well as people who travel large distances on a day to day basis, and of course aviation where energy density, safety and performance are critical.

I will take a look at those sources though. If it's easy to recycle solar panels that's a huge boon. When it comes to batteries I think technologies like sodium ion or iron oxide batteries are likely to win out anyway, and those are materials we have in abundance, it's just a shame about the energy density limitations.

To be honest I didn't even think about shipping as it only accounts for a small amount of emissions. Vegetable oil makes perfect sense here. Though I would remind you that compression ignition engines in cars can also be designed to run pretty much any fuel you like.