What going past 400 ppm of CO2 and 1800 ppb of CH4 means is not doom, but a poorer world for our grandchildren and their descendents. Yes, we had that amount in our atmosphere about 4 million years ago, and things were just fine. But that level did not occur overnight, geologically speaking. In fact, the rate of change at present for GHGs exceeds that of the periods of extinctions in geologic history. Even were we able to go back to the point of not adding GHGs to the atmosphere in the next two decades, what is already there will change our climate for tens of generations.
total bullshit. CO2 makes up .039% of the atmosphere. It has been at that level for hundreds of millions of years.
This entire man made climate change religion is a hoax. Its a lie, its bullshit of the highest order.
History of Atmospheric CO2 through geological time (past 550 million years: from Berner, Science, 1997). The parameter RCO2 is defined as the ratio of the mass of CO2 in the atmosphere at some time in the past to that at present (with a pre-industrial value of 300 parts per million). The heavier line joining small squares represents the best estimate of past atmospheric CO2 levels based on geochemical modeling and updated to have the effect of land plants on weathering introduced 380 to 350 million years ago. The shaded area encloses the approximate range of error of the modeling based on sensitivity analysis. Vertical bars represent independent estimates of CO2level based on the study of ancient soils.
Climate and CO2 in the Atmosphere
No, you stupid asshole, the present level of CO2 in the atmosphere has not been at the present level for hundreds of millions of years. And for the last 800,000 years the levels have cycled between 180 ppm and 300 ppm. Today, we are past 400 ppm, a level we have not seen for over 4 million years. At that time there was no Arctic ice cap, and the Antarctic ice cap was far smaller.
At the beginning and end of the Younger Dryas, we saw a minor extinction event that resulted in the extirpation of about 45 of the 54 large mammal species in North America.
Do at least minimal research before you flap your ignorant yap.