Mann claims that his hockey stick "demonstrated that the nature of recent warming is unprecedented...Dozens of independent studies have reproduced our original findings"; "It’s time for us to have a grown-up debate about climate change in this country"

Climate change deniers blinded by political ideology

...Hilliard demonstrates that he does not understand the so-called “Hockey Stick” graph that my co-authors and I published more than a decade ago, which demonstrated that the nature of recent warming is unprecedented...

Hilliard compounds the problem by citing attacks against our work by two Canadian climate change deniers (Fraser Institute-funded economist Ross McKitrick and energy industry consultant Stephen McIntyre) without noting that several independent studies have established fatal flaws in their claims.

Dozens of independent studies have reproduced our original findings...

We have as much right to speak out as any citizen. But as scientists, we have a special duty to make distinctions between our scientific judgment and our opinions as citizens.

Unfortunately, the people who choose to attack us are often so blinded by their ideology, they can’t tell the difference between science and political opinion...

It’s time for us to have a grown-up debate about climate change in this country.