that our mid-20th century climate was at a "just right" level, and that anthropogenic climate forcing is now causing a potentially dangerous change for the worse in our planet's climate. Both books are worth reading in detail, Peter. Max Max, Plimers full comment was "Even 2000 years ago the Earth was considerably warmer than now. The Romans were scantily clad and growing oranges and grapes in northern England". It may have been in his previous scholarly work " A short history of planet earth". One of my last memories of Northern England was playing cricket in the snow in April. Were the Romans, or their oranges, were quite as hardy as he claims? As usual, Plimer produces no reference to support his claim that the earth was warmer 2000 years ago. Maybe he meant 1000 years ago? The so-called medieval warm period? But the Romans had left long since. So no marks for history there Ian. You'd think Professors were supposed to be smart people but Ian Plimer is such a loser. He even managed to lose over a million dollars to the Creationists in failed court cases. It turns out that he hadn't bothered to read the letter of the Australian law he was supposedly trying to enforce, so its perhaps just not in his character to back up his climate claims by actually reading scientific references on the subject "Many of the claims have no citations but where there are citations, they are either for regional studies (and