If the aquifers aren't saved, we won't have any groundwater. We can't keep drawing them down, so yes, there has to be conservation. But, 20 years is a long time and there are already plans being developed to mitigate the impact. We need to build more reservoirs and implement market solutions to get water to where it is most needed. Repurposing less productive land won't go amiss either. Humans are adaptable and I'm confident we'll adapt to this.