A letter describing the city's new green-energy electricity aggregation plan alerted many Columbus residents that the program's start date is fast approaching and caused confusion for some. The letter, sent last week by Columbus Mayor Andrew J. Ginther and AEP Energy's Chief Solutions Officer Scott D. Slisher, was sent as a reminder to Columbus residents that thevoter-approved Community Choice Aggregation program, also known as Clean Energy Columbus, is set to begin soon. Starting in June, AEP Energy will supply "100% local Ohio-based clean energy to eligible residents and small businesses" through May 2034, the letter said. Participants will be automatically enrolled in the program, and those wishing to opt out have until April 29.