Importance of considering technology growth in impact assessments of climate change on agriculture

Many assessments of climate change impacts on global crop yields project declines as early as the 2020s. Losses are projected to increase with time, up to 50% by the 2080s. We carry out a systematic global review and compare published projections of climate change impacts from 34 studies and ∼4500 data points for the 2020s for maize, rice and wheat at country level with observed and forecasted national crop yields for the same period based on...