Ok, I give:
I think it's important in an argument about climate change to acknowledge that the Earth's climate DOES change naturally (warmer or cooler) AND that it has, in fact, been warmer during periods of Earth's history than it currently is today. The issue is that it is accelerating dramatically due to human influences and may exceed anything Earth has experienced for millions of years.
Although the relationship between CO2 in the atmosphere and temperature is important, there are other factors that affect the amount of solar radiation that is absorbed: periods of solar bursts of radiation, the shape of Earth's orbit combined with the tilt and precession of its axis, and the location of the continents allowing ice to build up and reflect radiation back into space.
There are also lots of natural ways of adding or removing CO2 from the atmosphere: abundance of plant life (remove), decomposition of living things (add), volcanic activity (add), capacity of the ocean to absorb it (add or remove), mountain building events that increase chemical weathering (remove).... etc.
Scientists' real microphone drop argument, however, is the following graph:https://www.co2.earth/co2-ice-core-data
(I can't post pictures, so click on "400 Kyr" to see it best, but this graph extends further into the past)
Atmospheric CO2 levels settled in the 180-280ppm range for hundreds of thousands of years. Over the past 150 years, it has spiked to over 400ppm and continues to rise (Industrial revolution coincidence? I think not). The only uncertainty is with future predictions and the full suite of effects this will have on the planet - it's either going to be bad, or really bad.
Unfortunately, politicians with an agenda don't give a shit about facts and evidence, but as John Oliver once said "You can't bring feelings to a fact fight!"