Comments on “Global crop yield reductions due to surface ozone exposure: 1. Year 2000 crop production losses and economic damage” and “Global crop yield reductions due to surface ozone exposure: 2. Year 2030 potential crop production losses and economic d

The Authors (Avnery et al., 2011a,b) estimated the relative yield losses of wheat crop in China in 2000 and 2030 to be 15%–20% and 25%–30%, respectively. And the relative yield losses of soybean crop in China in 2000 and 2030 to be 20%–25% and 30%–45%, respectively. These findings do not agree with the information that shows the relative yield losses of wheat crop should be greater than those of soybean crop in China. Additionally, do not agree with the findings of previous studies.