I have created a site where you can ask questions about the climate and get answers based in thermodynamics rather than flat Earth theory:

Thermodynamic Climate Interpreter

Ask it about radiation, the greenhouse effect, CO₂, back-radiation, the lapse rate, energy balance, or anything else related. It can demonstrate mathematical derivations if you ask it to. The answers are drawn from accepted thermodynamic and mathematical principles.

If someone tells you that downward infrared from CO₂ warms the ground, put that claim to the Interpreter and see what the physics actually says.