Old Rocks
Diamond Member
http://www2.sunysuffolk.edu/mandias/global_warming/fact-from-fiction.pdf
Misleading:CO2Has Been Much Higher in the Past and It Was Colder
440 million years ago CO2is estimated to be about 1200 ppm with large glaciation
Today values = 390 ppm
However, the sun was 4% weaker 440 million years ago!
To overcome the weaker sun, CO2values would need to be around 3000 ppm to prevent ice!
Misleading:CO2Has Been Much Higher in the Past and It Was Colder
440 million years ago CO2is estimated to be about 1200 ppm with large glaciation
Today values = 390 ppm
However, the sun was 4% weaker 440 million years ago!
To overcome the weaker sun, CO2values would need to be around 3000 ppm to prevent ice!