Sir, – Is Guy Liardet your only correspondent to argue against the concept of climate change? I was disappointed to see him responding to both a thoughtful letter by David Kibble (NR108/3) and bizarrely even himself (NR108/2) by yet again repeating misrepresentations and incorrect data (NR108/4). His approach does nothing to advance ideas and discussion on the matter. As the NR’s own guidance to authors on submissions is they must “[u]se facts you can verify, references that can be traced and avoid the more ephemeral rumours/superstitions,”1 then when breaches are permitted on these pages they…