“But It’s Been Warmer In The Past!”

Here’s an argument you’ve probably heard n times already:

 

“It was warmer in the past than it is now without CO2 being as high, therefore CO2 cannot be the cause of our current temperature high!”

– Forum troll, ca. 2014.

 

So, now that you’ve heard that argument n+1 times, without any indication of mathematical induction kicking in… (more…)