California is entering its fifth year of drought and is in the midst of decision-making about the future of the state’s climate goals. California’s water infrastructure represents one of the state’s largest energy users, consuming 19% of the state’s electricity for treating, pumping, and conveyance. The greenhouse gas (GHG) emissions associated with California’s water use are equal to the emissions from more than 7 million cars. This is what we call the water-energy nexus, and it is the next frontier for California’s climate and energy leadership. Advanced Energy Economy recently provided policymakers with our business-based perspective on it.