evidence: - Aggregated indicators of human wellbeing continue to increase, confounding some early predictions of imminent environmental collapse and providing no evidence in support of the idea that CO2-induced climate change as far as it has occurred already represents a significant threat to human health or wealth. [...] This point actually seems to be closely in line with Goklany’s thinking. Just as climate change is not a major (negative) driver of human wellbeing, CO2 has not been a major (positive) driver, either. Human agency remains paramount. - Rising CO2 is and will continue to be accompanied by a changing (warming) climate. (The true value of "climate sensitivity" – the long-term effect on global mean temperature of a CO2 doubling – continues to be controversial, but studies of past climates show that it is within the range predicted by climate models.) Along with the beneficial effects of CO2 on crops we can therefore expect more frequent heat stress events, which are a major cause of crop failure today. The most recent global assessment of crop yields in a changing environment found positive and negative effects for spring wheat and soybean – the positive effects mainly from rising CO2 and the negative effects mainly from heat stress. For maize, because it is already benefiting from internally concentrated CO2, the projection was all negative. Thus, the picture is mixed, and not all positive as Goklany’s report suggests.