The one that shows CO2 levels fluctuating between 180 and 300 ppm for the past 400,000 years before spiking to 380 over the last 65 years. When I saw it, I wondered how climate change deniers explained it, but I didn’t think I knew any. livinincali, are you saying that “we” aren’t sure that man caused this spike, or that that spike didn’t cause climate change, or that there is no climate change, or something else?
