Quote:
Originally Posted by irv
There was a well documented time in earth's history, the life of this planet, where CO2 was quite a bit higher than what it is today, but, of course, that is never talked about. There were also a few times when this planet was also much warmer than what it is today, but, of course, that is also not talked about either.
CO2 is injected into many greenhouses throughout the world because it is beneficial to the plants, crops and the like. If it were, CO2, as high now as it was back then, then our crops, forests, etc, would all be thriving more than they currently are now. The Medieval warming period was known as a time of prosper, a time of good things filled with abundance, but, of course, that is not talked about either and they, the alarmists/grifters would like that removed from our history books.
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Yes, CO2 levels and temperatures were higher in the past, as talked about here:
https://earth.org/data_visualization...istory-of-co2/
According to the link, the last time the CO2 level was as high as it is today (around 400 ppm) was around 20 million years ago. The temperature at that time is estimated to have been around 6 to 8 C warmer than the 1960-1990 average.
In regards to the MWP, here's a link:
https://skepticalscience.com/medieval-warm-period.htm
"Overall, our conclusions are:
a) Globally temperatures are warmer than they have been during the last 2,000 years, and
b) the causes of Medieval warming are not the same as those causing late 20th century warming."