https://www.history.com/news/mine-fire-burning-more-50-years...
Centralia is more of a weird natural disaster. It's essentially a slow-motion, underground forest fire. And, like most forest fires, while usually a human with a match is the proximal cause, if the human wasn't there, nature would still have supplied a spark eventually.
• What would the statistical yearly probability of a coal-seam fire be for seams we find, check up on, but never mine? (We know of a few seams in protected areas, but I don't think we know of enough to have any statistical power. Also, the natural catching-fire rate might be, say, one per thousand years, which would be a bit like the pitch-drop experiment in its requirements, yet would still mean that coal seams catch fire pretty much "as soon as" they reach the surface, in geological time.)
• More interestingly: how many coal-seam fires have happened historically in the Earth's 4.2 billion years being around, that finished and burned out all the coal, and now there's just a cave there? Or ex-cave sedimentary layer, given that these caves tend to collapse? Can we tell when such a cave/layer was previously a coal seam? (I assume so, because soot, but can pressure-treated soot be differentiated from other kinds of naturally-occurring mineral striae?)
Solar (3x), wind (5x), hydro (25x) are much higher land use.
Note that resource extraction use is considered temporary (and in the US, companies are required to pay for restoration, per the link above). Wind uses a large area, but agricultural use can proceed at the same time.
We currently have no viable CO2 removal technology. Nuclear power has no chance of destroying the planet (or even the biosphere).
Nature already scrubs CO2 and actually thrives on the elevated amounts; reducing production means nature will have a chance to catch up. That is, assuming we've not already reached a catastrophic tipping point where e.g. algae (responsible for most CO2 sequestration) die from the heat and the CO2 sequestered in permafrost is released.
Then again, per land area wasted , nuclear is 23 Km2 per year vs ... something tiny? Plus the comparison with coal only is unfair.
> 4. Focus on "nuclear vs CO2". If you're serious about global warming, nuclear is the only viable technology.
Here the question is how to remove excess CO2 without destroying the rest of the planet.