We have to stop calling carbon dioxide a greenhouse gas, because it isn't, and it does not exist in large concentrations in Earth's atmosphere, compared with other gases that are real greenhouse gases, such as water vapor. The global warming alarmists ignore CERN's creation of a pristine chamber replicating the Earth's atmosphere, which determined that if any warming is taking place, it's caused primarily by cosmic rays and (gasp!) THE SUN! Other things also affect global temperatures, although there is no such thing, such as La Nina, El Nino, and other weather phenomena. CO2 does not control temperatures - temperatures control CO2 levels.