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Super Earth existed millions of years ago. CO2 levels were much higher and the average temperature was a little higher as well, although we know they are not related. Back then the earth was able to sustain the largest animals to ever exist. The plant life had to be extremely abundant compared to today to be able to support the countless number of these behemoths, thanks to the higher CO2 levels.
During the Mesozoic Era (252-66 million years ago) CO2 levels were higher than today, with estimates ranging from 600-1,200 ppm. This period saw the dominance of dinosaurs and the formation of coal swamps. Temperatures were about 59°F.
Even with these high levels of CO2, global temperatures were not higher than they are now. How can this be? Because our planet is mostly ocean. When water temperature rises, it evaporates, then the vapor rises, then it cools in the upper atmosphere, then it falls as cool rain or snow.
Today our planet is starving at 400ppm CO2. We may be in a warmer period again (approx. 58°F -59°F ), but we still lack enough carbon to really thrive. We need to burn more coal and gas. That carbon has been trapped in the earth too long.
Instead of chasing the non-existent CO2 problem we should concentrate efforts on real pollutants like plastics, mercury, lead, pesticides, chromium, and many others.
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