The article discusses the impact of rising carbon dioxide (CO₂) concentrations on crop yields, contrasting model projections with field trial results. While models suggest that increased CO₂ will offset the negative effects of rising temperatures and decreased soil moisture on global crop yields, field trials using Free-Air Concentration Enrichment (FACE) technology have shown that the yield enhancement from elevated CO₂ is significantly lower than expected. The study highlights the limitations of chamber studies in predicting real-world crop responses and emphasizes the need for more comprehensive field trials to accurately assess the CO₂ fertilization effect. The authors argue that the current projections of future crop yields may be overly optimistic, and they call for further research to understand the complex interactions between CO₂, temperature, and other environmental factors to improve food security predictions.The article discusses the impact of rising carbon dioxide (CO₂) concentrations on crop yields, contrasting model projections with field trial results. While models suggest that increased CO₂ will offset the negative effects of rising temperatures and decreased soil moisture on global crop yields, field trials using Free-Air Concentration Enrichment (FACE) technology have shown that the yield enhancement from elevated CO₂ is significantly lower than expected. The study highlights the limitations of chamber studies in predicting real-world crop responses and emphasizes the need for more comprehensive field trials to accurately assess the CO₂ fertilization effect. The authors argue that the current projections of future crop yields may be overly optimistic, and they call for further research to understand the complex interactions between CO₂, temperature, and other environmental factors to improve food security predictions.