This is a parody video produced by the group Minnesotans for Global Warming sung to the tune of the song Draggin’ the Line. Oddly enough, back in 2010 Michael Mann threatened to sue the group over this parody for, in Mann’s estimation, illegally using his image and defaming him.
In light of his stinging loss in Canada, this post is dedicated to Dr. Michael Mann.
UPDATE 07/06/2017: Upon further investigation, it is looking like the Principia Scientific article cited above is not true. A review of the archives of the website, a 2014 article states that Dr. Tim Ball won Mann’s lawsuit against him during that time as well. Apologies for any inconvenience.