Has science yet separated out CO2 that’s man-made versus naturally occurring? Environmental science is unreliable!
Actually yes it has. Man-made CO2 has a different profile of isotopes.
A lot (half? don't remember) of the CO2 in the air is man-made. That's not disputed.
But that CO2 is not causing significant warming. Also: there is no, repeat no chance of runaway warming. The IPCC's feedback model is hopelessly wrong.
Also: the current warm period was not caused by CO2. It was as warm or warmer during the Medieval Warm Period, the Roman Warm period and the Minoan Warm period.
And in any case: if we could find a way of making it warmer we should certainly try to do so. We are teetering on the edge of a new (natural) glaciation period which would s l o w l y crush America under a mile of ice.
Also: we should try to create more CO2. It's literally plant food. Over geological time plants have optimised to 1000 ppm of CO2, or about 10%. We are a long way short of that.
Creating more CO2 is a simple way to 'green the earth' and dramatically improve harvests.