'Climate sceptics are like alcoholics' says Dr Wall

There is a moment in Malcolm Lowry's novel Under The Volcano that reminds me of climate change sceptics.Doomed alcoholic Geoffrey Firmin is on a journey towards death but he insists to his estranged wife Yvonne and brother that he can drink a beer or two because beer isn't really alcohol.For an alcoholic any excuse will do - even one as weak as the notion that alcohol isn't really alcoholic.For