The most likely answer to the question is that the passage supports the claim that humanity's impact on the world is ultimately temporary. The author tells us that after we disappear from Earth, one of the only things that will remain is the reddish metal that was used for wiring and plumbing. Although other future beings might use this as well, there will be no evidence of us creating it. The fact that there will be no evidence shows that humanity's impact on the world is temporary.
Explanation: It says you're "looking at all the details to figure out what should be done to fix what has gone wrong," which makes there a problem that needs a solution.
