Let's do another one. The idea that humans can and have had a big impact on climate is increasingly thriving. Apparently we are the central factor -Anthropocentrism. It started with Ruddiman who had produced a study His point is that the current Holocene shows an unique rise in carbon dioxide (measured in Antarctic ice cores) from some 255 ppm to 280 ppm. The other end of icing stadial spikes that indicate the start of interglacials show a (sometimes very) slow decline after the intial spike as seen here. How come, well the paleolithic man started to change his environment, cutting down forests to build villages, burn fires and have land for agriculture. This would remove the carbon sink function and would increase the CO2 in the air. So what do you say about that?