A better argument is to inform them that for 500 years during the Roman Era the Earth’s temperature was 2 degrees warming than it is today, and during that 500 year period life in Europe was great, crops grew everywhere, hell grapes grew in Ireland. There was no world-wide droughts are flooding.
And to top it off the hope of the Paris accord was to cool the Earth’s temperature by 0.5 % degrees in 80 years. Great idea, let’s destroy the economies of 1st world countries to lower the temp by 0.5 degrees.
During the Roman Warm Period, civilization flourished in areas where it had never been known, such as Gaul (France) and Britain. At the end of the Roman Warm period, a colder climate in the Asian steppes forced the nomadic horsemen westward, where they pushed the Germanic tribes to overrun the Western Empire.
The Roman Warm Period ended as the Empire fell. Do you remember what the cold period following was known as?
“The Dark Ages.” Yes, the nadir of Western Civilization. Thanks to the Byzantines, some of that civilization was preserved. And then, as the climate cycle repeated, we had the “Medieval Warm Period.” Also known as “The High Middle Ages,” where civilization flourished, universities were founded, cathedrals and cloth halls were built. Where Vikings raised cattle in Greenland (which isn’t done today because its too cold).
And then the cycle continued, when the climate turned colder, reduced crop yields could not support the expanded population that relied upon a warmer climate for food production, and in a colder climate, malnourished people lost their resistance to disease...
...and we had “The Black Death.”
Climate cycles are not new, and the formulae remain the same:
Warm = civilization = good
Cold = “Dark Ages” = bad
Now tell me again why we want it to be cold?