e t d e
Mann's statistical techniques were criticised by academic statisticians; the nine studies that replicated Mann's work -could take these criticisms into account, so the data clearly isn't bogus. Only a scientific ignoramus like Rich Grise could think otherwise - primarily because he doesn't seem to be able to think clearly.
Rich is too dim to appreciate that global temperatures are influenced by more than just the level of carbon dioxide in the atmosphere - the recent episode of (slight) global cooling is just one more short term fluctuation around the long-term warming trend.
He's also too dim to appreciate that while CO2 nourishes plants, it's just one of the inputs plants need to grow. More CO2 doesn't do them any good if they don't have enough water - and geobotanical evidence shows that when atmospheric CO2 levels were higher in the geological past, the stomata density on the under-side of leaves was correspondingly lower; back then fewer stomata let in enough CO2 without letting out any more H2O vapour than absolutely necessary.
-- Bill Sloman, Nijmegen