Yeah, good point :) Fully agree with this. The site will be very hard to reach anyway.
But for the case of industrial society at the tech level of 1800s and no knowledge there are things you can do too. Like make some of the bad stuff reachable with a bit less of an effort and allow people to figure it out by themselves. Our ancestors didn't all die due to bad mushrooms did they? So smart people will still be able to figure it out. Just give em a little help.
If we wanted to help the hypothetical future humans not die, we should make sure there is no lead available, so they can't use it for pipes, sweetener or fuel additives.
Mine all the galena and store it safely with the nuclear waste. Would save millions and millions of hypothetical lives.
But for the case of industrial society at the tech level of 1800s and no knowledge there are things you can do too. Like make some of the bad stuff reachable with a bit less of an effort and allow people to figure it out by themselves. Our ancestors didn't all die due to bad mushrooms did they? So smart people will still be able to figure it out. Just give em a little help.