(another thing back then in Germany - ramjet engine using coal in a metal basket as a fuel. The war does put minds to work - radars/computers/nukes on the Allies side also come to mind.)

I've read lately about another startup Savor that aims to make synthetic fats. They can make it in a variety of forms of it, from cooking oil to something like butter. They claim they can make it both much cheaper and with a much smaller carbon footprint than through conventional agriculture.

https://www.hertzfoundation.org/news/hertz-fellows-tech-comp...

Nothing odd about flagrant hypocrisy, it's part of the brand

Also there's various startups working on casein (milk proteins) produced by bacteria, fungi or even algea. Some solution of sugars + nutrients in, casein rich product out. That in turn useable for many (all?) things animal milk is used for today: cheese, yogurt, quark, skyr, kefir, ice cream etc. Potentially a drop-in replacement for any of those.

Some of this would already be on the market, if obtaining regulatory approval wasn't so extremely difficult & time-consuming (partly for good reasons).