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hey bro,
thanks for asking, its all a matter of perspective of course, but I think, one example is the movement of species, doesn't even need to be a sickness, maybe just a cute pet

there are always more implicit ones like farmers wanting to make more money by exporting so they clear more land for a single crop, this again works to destroy balances

there are good examples of how we have overcome damage from such things though, they are easily fixed if our intention is there, Loess plateau is a good example I can think of(early globalisation and its impacts)

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