The dynamic between utilities and customers is changing. Instead of residents reaching individual agreements with utilities, they’re now ganging together into buying groups where customer purchase power together from utilities that promise 100 percent renewable energy. Six states in the U.S. already allow “community choice aggregation” (CCA) as this mechanism is called, and it allows energy consumers get into a deal with suppliers where they accept the terms and conditions on how the energy is supplied to them. The CCA lets customers ask suppliers to source particular types of power, such as wind or solar, and would encourage communities themselves to start building clean power sites to lower energy contract prices.