My first one was a random floppy distribution off an ftp server. I then tried SuSE off a CD-ROM and then went with Red Hat for a while. Then Debian, now Ubuntu. Tried FreeBSD but didn't stick. Probably Debian again next. I always prefer Debian on the server though.
There is biochar which can be scaled by providing cheap pyrolysis retorts and training how to bioactivate it. Incentive is increased agriculture productivity long-term. Capture should be done directly from flue gas since not needing enrichment. There are also carbon-negative concretes which have good potential for capture.
Synfuels from 100% renewable are at least carbon neutral, which is as good as it gets.
Sorry, I haven't started memorizing Fediverse handles yet. Tim Morgan measures ECoE in percent, and real GDP is GDP minus debt, or x units of debt produce a fraction of that in GDP. Plus ECoE accounting. His model is proprietary, so nobody exactly knows how it's computed but he himself.
That IRENA model seems to link some large spreadsheets and notes on that page. No idea how complete that is.
As to investments necessary, some two decades ago I estimated we'd need some 3 TUSD/year, inflation-adjusted, for the next 40 years to transition. As a rough estimate that's as good as any other guess, not facturing in extraction of progressively depleting resources.
The issue is more that we're currently running out of extractable fossils (net energy peak for oil liquids is projected to peak as early as 2025 and the decline into nonextractability is rapid) so it's a question of having liquid fuels and synthetic stock, at all.
What kind of life style we can expect where hydrocarbons and energy in general is expensive is an interesting question. See e.g. https://surplusenergyeconomics.wordpress.com/ for analysis of that.
Nice. Where is power port on a hooker? Eh, nevermind.
I use photovoltaics, but not insular blackstart-capable battery buffered so when the grid is down I also have no power. Next year, though. Seems it's 2000 EUR minimum.
You might find your responses here a bit biased.