"There's no substitute for knowing what you're talking about."

We could all use a laugh... and I can't help stifling one at the grave debate between Dr Greg Ayers (head of the Bureau of Meteorology, former CSIRO atmospheric research chief, doctorate in physical chemistry) and Cardinal Pell ("I spend a lot of time studying this stuff.") For me, the gem is Pell including nitrogen in a list of greenhouse gases. Ayers: "That is not a greenhouse gas; it is 78 per cent of the atmosphere. You cannot have people out there telling the public that nitrogen is a greenhouse gas because it is not."