* Taum Sauk hydro pump-storage collapse
* Duke Energy's 30k+ tons of coal Ash spill into the Dan River
* But that was tiny, try Kentucky's 306 million tons of coal Ash spill or Tennessee's 525 million. People can only stand and watch that unfold, no modern robot is going to stop that either.
* Gas pipes in San Bruno, New Jersey, and Colorado exploding, killing families instantly
* Deepwater Horizon and the Valdez. Again, not much to do but stand and watch as it unfurls.
I could keep Googling more but every source of energy has its gigantic catastrophes where no amount of human bodies or robots will save the day (well, I guess a large enough pile of bodies would plug a hole in a collapsing dam).