Drought and depleted ground water sources have led to agricultural water supply issues across the globe. We will see what 2 Japanese companies are doing to tackle this problem. The first has developed soil conditioners made from waste glass that have high levels of water retention capability. The second is a venture company, which has developed a device that uses sensors and IoT technology to provide precise measurements of moisture content in soil. Researchers say this will allow for the cultivation of crops with virtually no waste water.