This article is just bad. The atmospheres of Earth and Venus are not even remotely similar. Venus has no water and the primary greenhouse gas is water vapor. His heart is in the right place but he doesn’t know what the heck he’s talking about. Leave this argument on the floor.
I think you missed the whole point of the article. The atmosphere of Venus is almost entirely composed of CO2, and yet the temp is the same as Earth's at the same pressure level and allowing for distance from the Sun.
He's a physicist (and a good one). He DOES know what he's talking about. No one has been able to argue this FACT that he has brought to light - These so-called "greenhouse gasses" have zero effect on atmospheric temperature. It is all controlled by solar radiation.