Drought and climate change are impacting water supplies around the world. But desalination — pulling fresh, drinkable water from saltwater— can offer some relief. Desalination technology has existed for a while; dry countries like Israel, Saudi Arabia and Spain have used it for years. Most desalination technology uses a lot of energy and leaves behind a toxic byproduct: all the salt extracted from the water. Scientists and entrepreneurs are working to improve its capabilities, from moving the process offshore to running mobile desalination hubs on solar power. One of those entrepreneurs is Robert Bergstrom, CEO of OceanWell, based in California. The company is testing desalination pods at a reservoir near Los Angeles. Eventually, the pods will go into the ocean to create fresh water.