This is Guac's thread - I was trying to limit my responses to carbon dioxide levels. But if he wants to foster here a discussion on human population (I think a separate thread would be preferable), that's his choice.
I don't think it's difficult - I think it is impossible - to reconcile phrases like
I don't think it's difficult - I think it is impossible - to reconcile phrases like
- Saghost's "...we aren't close to what the limit [of human population] that the planet can safely support...", or mspohr's "...the earth could easily support 10x current population..."
- with the right now collapse of the world's insect populations: What’s Causing the Sharp Decline in Insects, and Why It Matters
- or my own observations of a severe decline in not even a quarter-century of observations of effectively every species of migratory songbirds nesting in this stretch of tundra. It is not, I am convinced, a result of any ecological change here - it is because the massive disruption of their wintering grounds: monoculture ag-grounds displacing winter grasslands in NoAm, clear-cutting in Central and South America, and urban sprawl everywhere.
- Can humans survive without songbirds? Probably, although they likely are unplumbed marker species for ecologic doom. Can humans survive without insects and other invertebrates? With their unparalleled niche near the base of the base food chain, almost certainly not.