ATI
The American Tradition Institute a.k.a. ATI a.k.a. Energy & Environmental Legal Institute is a "think" tank that supports or engages in climate science denialism. You can read about it here and here. Michael Mann is a climate scientist, famous for bringing to the world's attention the alarming problem of hockey-stick style global warming. According to Wikipedia:
The IPCC acknowledged that his work, along with that of the many other lead authors and review editors, contributed to the award of the 2007 Nobel Peace Prize...
The ATI, Michael Mann, and the University of Virginia have been…