I would not be so sure about that. There are a variety of scenarios where climate change breaks the food web, e..g., ocean acidification (which is happening mu

I would not be so sure about that. There are a variety of scenarios where climate change breaks the food web, e..g., ocean acidification (which is happening much faster & in greater amounts than anticipated). While not extincting all life, & some humans plausibly survive, it is normal for populations to collapse to 10% of previous under conditions losing only down to 80% of previous feed stock -- when down to <10% of feed stock, how many survive?