CO2 comes from all different sources. Yes humans do create some of it, but nothing compared to naturally occurring sources. Oceans emit several order of magnitudes more CO2 than humans could hope to generate. Insects, yes they breath too, also generate CO2, and they generate more than human respiration, fossil fuel burning, and industrial sources combined.
Needless to say, be prepared to turn off the lights once we start regulating something that we don't understand.
Needless to say, be prepared to turn off the lights once we start regulating something that we don't understand.