Ian Musgrave has written an open letter to Opposition Leader Tony Abbott, correcting him on his claim that "at the time of Julius Caesar and Jesus of Nazareth the climate was considerably warmer than it is now".
But where did Abbott get the notion that it was considerably warmer in Roman times? Most likely from Ian Plimer, who on page 59 of Heaven and Earth writes:
The Roman Warming Period (250 BC - 450 AD)
Warming started about 250 BC and was enjoyed by the Greeks and Romans. The Romans had it easy. Although the Empire started in cool period, grapes were grown in Rome in 150 BC. By the 1st…