This blog has written about the dangers of current trends in the oceans, that it can lead to dead oceans that will become toxic and sources of H2S. I now came across a video of Oneocean that lays it out as I understood it. Stop carbon emissions and let us focus on keeping the oceans healthy.
End Permian
This outcome gets little attention, but it happened before, how I came across it was in the graph below. It leads to a simple conclusion : We must stop and reverse the damage, or we will go extinct.