Reducing the amount of water we use to grow our food would go a long way to helping the world’s water stress. At the moment, we use more than two thirds of our water for agriculture. With the United Nations predicting that by 2025 two thirds of us could be living with water scarcity, it throws the issue into sharp relief. Fresh water is rarer than you might think. In fact, it’s only 3% of the planet’s supply with around 75% stored in glaciers.