Yoram Cohen, a desalination expert and professor of chemical and biomolecular engineering at UCLA  weighs in on Catalina Island’s desalination plant, its impact, and the drought.  “At the end of the day,” he says, “I think that we have to keep our water portfolio diversified, just like you would keep your money invested in multiple places. You want to be safe, right? You don’t put your money in one investment.”