#fuckcars
Embedded CO2 for a bike is like 100kg (that's what 4 trees in your backyard absorb a year), which over a lifetime of 30 years is negligible.
Everyone uses "oracles" eventually, there is no true "trustless", but you can have systems which are publicly "loud" about being changed, even ethereum needs "oracles" that can be tampered with and which you need to trust, that's why I used the word.
Bikes are actually greener than walking, because if you need to move, they allow you to have a greater daily range for a not much higher footprint (more efficient and 3 times faster).
There are examples like DNS or the Mozilla foundation or all sorts of repos. Due to the receipt system you can verify if the commit history has been tampered with (your image has been removed from the database or edited). For court documents each court could host its own database where checksums are verified periodically, by "oracles".
Nobody has teeth?
Too late, on my way to Godot, lesson 3, bye-bye suckas.
Look, Git exists and image or document registration in an official onine database is Git diffs with less functionality because you can't remove previous commits: you just append new lines. This is a solved problem. If you're trying to solve a double-spend problem, then you need more than that, but it's overkill for your problem.
PS: maybe I'm oversimplifying it, but here's more discussion on this:
https://stackoverflow.com/questions/46192377/why-is-git-not-considered-a-block-chain
https://stackoverflow.com/questions/59509764/is-git-distributed-or-decentralized
A nonprofit with multiple synchronized copies of the database and you can get your own copy, synchronize, fork it if you have the space, like a GitLab repository. Remember this is not for secure transactions and to prevent double-spending like a currency. It's just an additive database. You don't need to overkill with a blockchain.
Because we don't know how long this war is going to last and you're making comparisons with a short war+long counterinsurgency that ended...so it's hard to say more died in Iraq when you don't know how many are going to die plus refugees plus kidnappings in this.
Yea, I thought about that. If you think Sodium goes to town with water, imagine what would happen if thrown in a cloud of Chlorine :D