Almost as intense as that cold wave that froze the vikings out of many of thier former settlements and covered it all under ice and is now only being revealed for the 1st time in 1000s of years. Only there wasnt many SUVs to cause that that time.
I believe he's referring to The Milankovitch Cycle.
If that were the cause of this warming trend wouldn't winters be colder?
Winter has been notably warmer around were I live.