As for rising CO2 "becoming a poison"
You wanna correct that obvious misquote or remain a verifiably shameless liar?...
You are the one that mistakenly described CO2 as a "poison", I merely corrected your error.
CO2's natural range has a much higher ceiling than today's 0.04%.
"Natural" meaning life (as we know it) sustaining?
Natural as in the natural range of CO2. During warm earth conditions, when the carbon cycle is in full swing, converting CO2 into living cells, CO2 levels are 5 TIMES higher than today, which still isn't much, only one fifth of one percent.
...who cares about some ridiculous "CO2 natural range" or "ceiling"?
You are the one claiming that today's levels are "high" when actually they quite low, or, about where they should be, during an ice-age, at this point of an interglacial.
Levels are only so low currently because we are in an ice age and temperatures are cool.
We should be entering an ice age...
We are in an ice-age, but have the great fortune of being in an inter-glacial period of an ice-age. But you want to go into a glacial advance? Do you realize how much life dies when the planet cools, CO2 levels fall and the carbon cycle falters? Have you ever noticed how nicely the medieval plagues lined up with the Little Ice Age, when Europe depopulated for 3 centuries? But, some de-growthers view that as a feature, not a bug.
...but we've extracted and burned so much fossil fuel recently that we're quickly warming now instead...
Well, we are warmer than 20,000 years ago, during the last glacial advance when Chicago was under a mile of ice, but cooler than the
Holocene Climate Optimum that was 9,000 to 5,000 years.