The whole science is based on ghg's warming the oceans to create evapouroartion which is why we are alive. No atmosphere and no mass.
We dont need back radiation. Observed LAWS of Science explain all the heat we have. Not one of those LAWS even considers greenhouse gases. And as per Holmes and Zeller / Nikolov these same LAWS correctly predict other rocky planets. Some of those planets do not have very low ghgs. What was the common theme here.
Distance from Sun and atmospheric pressure Go figure.
