Agriculture is the largest global consumer of water - accounting for around 70% of the freshwater drawn from lakes, waterways and aquifers around the world. The IAEA is operating projects in Kenya that use nuclear and isotopic techniques to inform farmers how to use their scarce water resources efficiently for both rain fed and irrigated agriculture. One project is supporting the use of "drip irrigation", a cost-effective technique that can reduce water use by 50%, compared to other forms of irrigation.