 This research provides a comprehensive analysis of global irrigation efficiency, taking into consideration regional differences in climate, hydrology, and crop type. The authors found that irrigation efficiency varies widely from region to region, with the lowest levels of efficiency occurring in South Asia and Sub-Saharan Africa, and the highest levels occurring in Europe and North America. They also estimated that replacing surface irrigation systems with sprinklers or drip irrigation could increase crop yields by up to 15 percent, while reducing non-beneficial water consumption by up to 54 percent. These results highlight the importance of improving irrigation efficiency in order to maximize crop yield and minimize water waste. This article was authored by J. J. Jermeyer, D. Gerton, J. Hink, and others.