From his Wikipedia entry (best I could do in one minute):
Professor Timothy Fridtjof Flannery (born 28 January 1956) is an Australian mammologist, palaeontologist and global warming activist. Flannery was named Australian of the Year in 2007 and presently an adjunct professor at Macquarie University. His controversial views on shutting down conventional coal burning for electricity in the medium term are frequently cited in the media.
Methinks he’s working outside his field here.