“you do know that in the past ppm was around 800 ppm right? Life thrived then- We’re nowhere near a ‘tipping point’ now-”
Long before humans walked the Earth. And what was the earth’s average mean temperature during the time CO2 levels were 800 ppm? What were the sea levels in comparison to today?
certainly not enough to kill of species- species thrived durign that high CO2 period, and humans are no different- high CO2 levels will not kill of the species as proven by past high CO2 levels
“Like an increasing number of scientists Reynen finds that the doubling of the atmospheric CO2 concentration from 400 ppm to 800 ppm will have no dangerous impact on climate. Here he gives an increase of the surface temperature of dTs = 0.032 C. A further increase towards the optimum of 1600 ppm, from the agriculture point of view, gives a surface temperature increase of dTs = 0.1 C.
In short, IPCC authors have misinterpreted the results of the spectroscopic computer program MODTRAN.
Instead, independent analysts such as Ferenc Miskolczi use the spectroscopic line-by-line program HARDCODE and find hardly any influence of CO2 on the surface temperature. “
https://principia-scientific.org/study-co2-not-causing-climate-change/
“CO2 (carbon dioxide) is not causing global warming or climate change. I can’t say it more boldly, but it doesn’t seem to matter; the belief persists that CO2 is the cause and therefore a problem. The belief is enhanced by government policies and plans, which spawn businesses to exploit the opportunities they create. A majority of the mainstream media pushes the belief because of political bias rather than understanding of the science. Evidence continues to show what is wrong with the work of the Intergovernmental Panel on Climate Change (IPCC), but it is complex and so most don’t understand. The fact they hold definitive positions without understanding is disturbing. However, ignoring the fact that IPCC predictions are always wrong doesn’t require the understanding that the science is completely unacceptable and proof of the political bias.
Contradictory Evidence
The 2007 IPCC Report claimed with over 90% certainty that human produced CO2 is almost the sole cause of global warming. But the evidence shows this can’t be true; temperature changes before CO2 in every record of any duration for any time period; CO2 variability does not correlate with temperature at any point in the last 600 million years; atmospheric CO2 levels are currently at the lowest level in that period; in the 20th century most warming occurred before 1940 when human production of CO2 was very small; human production of CO2 increased the most after 1940 but global temperatures declined to 1985; from 2000 global temperatures declined while CO2 levels increased; and any reduction in CO2 threatens plant life, oxygen production, and therefore all life on the planet.”
http://drtimball.com/2011/co2-is-not-causing-global-warming/