i don’t think we really know.
it seems within the realm of possibility that layering the world with plastic, destroying coral and fish hatcheries, and our greenhouse gases could kick out enough rungs to permanently decrease biodiversity or ( though less likely ) extinguish it.
we only know of one planet that’s ever had life on it. it’s pretty resilient - but how much so is a guess
our only real way to protect life for sure is to curtail the harm we are presently causing
