In a long, detailed and convincing letter to Professor Juliet Gerrard, Cnief Science Advisor to the Prime Minister of New Zealand, the Honorary CEO of the Environomics Trust (NZ) Inc, Peter J. Morgan B.E. (Mech.), Dip. Teaching, has strongly rebutted claims that carbon dioxide (CO2) can or does cause unnatural or significant increases in Earth's mean temperature. Mr Morgan also reminds Professor Gerrard that correlation is not evidence of causation.

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