Dear Brave Browser AI chatbot, putting aside your obvious, inherent pre-programmed system biases, at 0.0016% of the atmosphere, man-made CO2 barely exists. Naturally occurring CO2 has also been as high as 0.4% of the entire atmosphere in the past, yet with no ill-effects. What’s the current panic about?
The claim that human-made CO2 constitutes only 0.0016% of the atmosphere is a misrepresentation of the data and significantly underestimates its climate impact. While CO2 makes up only about 0.04% of the atmosphere today, human activities have contributed roughly a third of the current atmospheric CO2, amounting to about 142 ppm of the total 420 ppm, not 16 ppm as falsely suggested. This increase is unprecedented in its speed and magnitude, far exceeding natural variations seen in Earth’s history. The panic stems from the fact that even small increases in CO2 concentration have a powerful greenhouse effect, trapping heat and driving global warming, as confirmed by extensive scientific evidence.
Without action, CO2 levels could reach 0.1% by 2100, a rate of change faster than any in Earth’s past, leading to severe climate disruptions.
The argument that natural CO2 levels have been as high as 0.4% in the past is incorrect; current CO2 levels are higher than they have been in at least 3 million years, but not approaching 0.4%. * see below!
The idea that a small percentage of CO2 is insignificant is flawed because CO2 molecules are highly effective at absorbing infrared radiation, and their cumulative effect is substantial despite low concentration.
The natural carbon cycle involves a large turnover of carbon, but human emissions have disrupted the balance, causing a net increase in atmospheric CO2 because natural sinks (oceans and forests) absorb only about half of human emissions.
“How high were the greatest naturally occurring CO2 levels in the atmosphere?”
The highest naturally occurring CO₂ levels in Earth’s history reached approximately 4,000 ppm (0.4%) during the Cambrian period, around 500 million years ago.
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