Heres Freeman Dyson, one of the smartest people ever to have lived, on climate change alarmism: The climate-studies people who work with models always tend to overestimate their models. They come to believe models are real and forget they are only models. Most of the evolution of life occurred on a planet substantially warmer than it is now and substantially richer in carbon dioxide. ... The amount of carbon dioxide CO2 is 0.0407. ... It is four one-hundredths of one percent: 407 parts per million This concentration is close to the minimum level to sustain robust plant growth. Three times the present level is ideal and is the level maintained in commercial greenhouses.

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