A couple of problems I have with this one:
1 - while a mathematician may be a scientist (though not necessarily so) that does NOT make him a climatologist. His expertise seems to be more concerned with the economics of global warming than with the actual science.
2 - the writer makes many scientific claims without providing links to the relevant research. Suspicious, at best. While some of these claims could POSSIBLY be valid, there is nothing to show what these claims are based on.
3 - the Ludwig von Mises Institute is a libertarian academic organization engaged in research and scholarship in the fields of economics, philosophy and political economy. NOT science and NOT climatology. They are considered to be "right wing" in their ideologies, and as near as I can tell with just a short scan, the Institute is not doing any research into climate change.