I'll accept your apologies later since this is my own work. I'll also point out that the 'peer review' process has been corrupted to the point that papers have been accepted and then rejected purely because they found against 'consensus' (e.g. Kauppinen and Malmi 2019, which was corroborated by the University of Kobe before 'Pal Reviewers' took it down!)
I hope your maths is up to this:
Consider the relationship between atmospheric concentration (C) of a greenhouse gas (GHG) and the warming (W) it is alleged to cause. This is logarithmic of the form W = k*log(C) for some constant k. If we take logs to base 2, k is the sensitivity: i.e. the temperature rise that results from doubling the concentration. Using the current state for CO2, we know from Schönweise that W = 7.2°C and from the IPCC that C = 417ppm. So:
W = k * log2(417)
Thus k = W/(log2(417)) = 0.83 °C/doubling
We can use this to calculate the warming (Wn) that would arise if every molecule of humanity's CO2 were removed from the atmosphere. According to the IPCC, 4.5% of CO2 input is from human emissions, so 95.5% (i.e. 398ppm) is natural.
Wn = k * log2(C) = 0.83 * log2(398) = 7.145°C
The amount of warming from humanity's CO2 is thus W - Wn = 7.2 - 7.145 = 0.055°C, which is below the threshold for measurement error and hence insignificant. Of course, you might question the input values above, but the same sort of result arises for any reasonable input parameters, with the biggest value for AGW I've managed to coax out of this being 0.25°C.
Further, the above calculations assume the greenhouse effect to be the only atmospheric insulation mechanism. However, there are at least two other major mechanisms, and so even the tiny warming calculated here must be an overestimate.
The same can be shown for methane.