Asclepias
Diamond Member
Never has mankind contributed so much CO2 in the history of the earth either.It has never been a pollutant in the history of the earth...A response was:Everyone knows that carbon dioxide is critical for life on earth. CO2 is where humans get their oxygen and plants get their food. No CO2, no life on earth. Implicit in your Climate Change argument is that at some point, CO2 stops being critical for life and becomes a pollutant. At what CO2 concentration in the atmosphere is your inflection point? That is, what is the CO2 concentration in the atmosphere where CO2 stops being life sustaining and becomes dangerous to the planet? You need to know the answer. It is literally a life or death question.
So you are saying that if the CO2 concentration in the oxygen we breath gets above 8% everything will be fine?
Answer:
Currently, it is at .04% (400 ppm), or 1/200th of your hypothetical concentration. And, we were at 15% (or 15,000 ppm) when there were dinosaurs on earth and leaves as big as Volkswagens. It didn't end life on earth, it made it huge.
Further, it appears that 150 ppm (we are 400 ppm) is too low for life on earth. My contention, it appears we are dangerously close to too little CO2, not too much.
Question, what is the inflection point and what is the science behind it?
Davey T
From: US Message Board - Political Discussion Forum <[email protected]>
Sent: Sunday, March 1, 2020 11:11 AM
To: [email protected] <[email protected]>
Subject: Climate Change Adovicate- Where is your inflection point? - New reply to watched thread
US Message Board - Political Discussion Forum
Davey T, Asclepias replied to a thread you are watching at US Message Board - Political Discussion Forum.
Climate Change Adovicate- Where is your inflection point?
Davey T
Everyone knows that carbon dioxide is critical for life on earth. CO2 is where humans get their oxygen and plants get their food. No CO2, no life on earth. Implicit in your Climate Change argument is that at some point, CO2 stops being critical for life and becomes a pollutant. At what CO2 concentration in the atmosphere is your inflection point? That is, what is the CO2 concentration in the atmosphere where CO2 stops being life sustaining and becomes dangerous to the planet? You need to know the answer. It is literally a life or death question.
"Implicit in your Climate Change argument is that at some point, CO2 stops being critical for life and becomes a pollutant."
CO2 becomes lethal at 8% to human existence. At some earlier point it becomes a pollutant. Are you claiming it never becomes a pollutant?