Many factors in climate change other than CO2:

‘the science of solar cycles – sunspots, flares & otherwise,

the science of decadal and centuries-long ocean cycles,

the science of variable jet streams and wind currents,

the science of Earth’s orbits around sun & tilts on its axis,

the science of outer-space cosmic/galactic winds,

the science of cloud formation and sunlight feed-back,

the science of heat retention by water vapor & humidity,

the science of both surface and sub-sea volcanic eruptions,

the science of sub-sea methane formations and releases,

the science of oceanic “sink” for and release of CO₂,

the science of CO₂ fertilization vs. alleged “pollution,”

the science of econometric cost-to-benefit considerations