Is there a master list of all the die offs blamed on man, pollution, technology or global warming that was later found to be something natural?
I remember the seals dying many years ago from pollution but it turned out to be a canine disease they passed from nose to nose.
Then there was the first be die off because of pollution or acid rain. That turned out to the be mite.
Then there was the mutated frogs caused by pollution. That was actually a parasite.
I am sure there are plenty more.