evidence: CLAIM: Human emissions could not be driving global warming since they are a small fraction of natural emissions. Temperature actually drives CO2, not the inverse. So the current rise in atmospheric CO2 is caused by ocean outgassing, not human emissions. [...] Several atmospheric measurements provide further corroboration that human emissions are the source of rising global atmospheric CO2 concentrations[4],[10]. Figure 5, top, shows observations of monthly CO2 concentrations at Mauna Loa Observatory and the South Pole, with concentrations at both stations continuously increasing since measurements began in the late-1950s. Another feature is that CO2 concentrations at Mauna Loa have increased by a few ppm compared to the South Pole, indicating higher CO2 input from the land-dominated northern hemisphere, where most industrialized regions are located. Furthermore, measured atmospheric oxygen (O2) concentrations have been steadily decreasing globally since regular observations began around 1990 (Fig. 5, bottom). Atmospheric O2 concentrations are not affected by ocean CO2 outgassing, so the decreasing O2 concentrations indicate that increasing atmospheric CO2 is primarily driven by an oxygen-consuming process, namely combustion, but also respiration.