Adding to PlunderBunny, the Romans also used urine collected from public toilets to make detergents to whiten clothes.

The Economist was recently citing hydrogen as "deep tech" [1] (meaning long R&D cycles, sometimes unproven techniology no short term profitability, heavy investment, industry-wide transformative power).

Most of your sources have plans focused on hydrogen production, but I'd be interested to see specific targets or plans regarding specific uses like fertilizers. There are some in the Hydrogen Roadmap Europe, but it seems focused on transportation [2].

[1] - https://www.economist.com/business/2026/03/01/at-last-reason... [2] - https://www.clean-hydrogen.europa.eu/media/publications/hydr...

Federation can feel like "just a feature" but the E2E encryption (also in group chats) is a reason for Matrix to exist and a big reason why it's so slow.

Well there's always Matterbridge. If you don't have complicated workflows to replicate (and even then) you can just replicate to XMPP, Nextcloud or whatever.

Germany (government and armed forces) and NATO also use it.