"The most recent period when CO2 levels were as high as today was around 15 million years ago, during the Middle Miocene. CO2 levels were at about 400 ppm.
"What was the climate like at the time? Global temperatures were 5 to 10 degrees Fahrenheit higher than they are today.
"Sea level was approximately 75 to 120 feet higher. There was no permanent sea ice cap in the Arctic and very little ice on Antarctica and Greenland. "
This has been flagged as spam show
"The most recent period when CO2 levels were as high as today was around 15 million years ago, during the Middle Miocene. CO2 levels were at about 400 ppm.
"What was the climate like at the time? Global temperatures were 5 to 10 degrees Fahrenheit higher than they are today.
"Sea level was approximately 75 to 120 feet higher. There was no permanent sea ice cap in the Arctic and very little ice on Antarctica and Greenland. "
(Tripati 2009). Science Magazine
goog2k 2 years ago