In hot countries like Israel, if you don’t irrigate your garden you’ll quickly see it turn yellow. At the same time, water in scarce in the tiny country. That's why a new Israeli app uses real-time weather data to control your sprinklers.

Israel's top golf club is always thinking of new ways to save water. The club even imported a type of grass from beaches on South Africa's and Australia's borders, with grass roots that can grow strong even when sprinkled with salt water.