The fact that none of those political heads has been able to name a physical law that supports and predicts the manmade climate change they endorse in thier pseudoscientific political statements should tell you something about the validity of thier collective positions.
The reasons for the theory have been given repeatedly. Quit lying! If there's anything pseudoscientific going on, it's your refusal to explain what happens to energy absorbed by added CO2. You want us to ignore Conservation of Energy!