evidence: Lacks specifics : It is unclear what climatic factors are or are not included in the phrase "and this environment that we live in". [...] At first impression, this is actually a not-quite-straight-forward question to answer. It is understandable that someone gives an answer like: "No, most likely the primary control knob is the ocean waters and this environment that we live in." [...] Because we humans as aggregate emit CO2 at a rapid rate, largely due to fossil fuel consumption, CO2 can be considered as a "primary control knob" in the sense that it is the most obvious and available knob for us to turn to influence the climate. Although we cannot directly influence other knobs such as the ocean heat pump mentioned above, we can in effect through the CO2 knob—keep in mind the background noise, i.e., natural variability, still operates. That is not saying that there are no other knobs that we can turn. Land-use is one factor that is also important, as land-use changes can affect climate. Land-use changes also affect atmospheric greenhouse gas concentration (e.g. think of all the smoke coming from burning forests for agriculture). In essence, CO2 is humans’ primary climate control knob.