Dr Michael Mann (177)

<p><span style="font-size: 10pt;">American climatologist  Michael Mann drew a chart  back in 1999 .   It's called "The Hockey Stick Graph" because of the way it shoots up.  There was no new information in it and it drew on agreed international temperature data. <br /> Like Charles Darwin, Dr Mann dared to publish. His "hockey stick" still makes him a target for fossil fuel lobbyists.  So what happens when a scientist is taken on by powerful interests ?  Dr Karl asks him about the experience.</span></p>