Wow I didn’t know that. I read if it hit 0.02% plants start dying but I guess it’s 0.015%. How did it get so low? I would think with everything covered in ice the CO2 wouldn’t be absorbed by plant life etc. Proves the earth can lower it on its own though, but these people are insane, talking about blocking out the sun. Like hell they will. I’m 56 and lived in New York all my life on Long Island by the ocean. I remember clear as day the temperature and climate from when I was 2 years old and NOTHING nothing has changed here. It’s the same every year, no odd feelings about the seasons, temp, climate, every summer the temps hit the 90s and every winter we hit down as low at 10 degrees. Actually in 2016 we hit as low as zero in January. But my point being is if we had any substantial change in climate, I certainly would have noticed it from living in the same place for 56 years, the temps are the same and the sea water isn’t rising up. Matter of fact by Long Island sound there’s this pier that has been in place since the 1800s. It’s STILL above the water line. Why, if the polar caps are melting? But I guess now liberals will tell us “Oh, climate change only happens in certain sections of the earth” yeah sure, the atmosphere stays completely static.
As temperatures cool, the oceans release less and less CO2 back into the atmosphere.
Also, huge amounts of ocean water were frozen - sea level dropped 400 feet - so that ice released no CO2.
Also, volcanos are a significant source of CO2. Since about 25% of the Earth was covered in ice, that most likely suppressed some normal volcanic activity.
Also, forest fires and grass fires release a lot of CO2, and the ice and colder temps suppressed fires and the natural decay of dead vegetation.
Man, of course, is the smallest contributor to atmospheric CO2.
We have added only 4% (16 ppm) to the current CO2 level of 400 ppm.