MONTPELIER, Vt. (AP) — A group of four environmentalists on Monday asked the Federal Trade Commission to determine if Vermont’s largest electric utility is making deceptive claims about some of the renewable energy it produces.

In their petition, the environmentalists say Green Mountain Power claims its customers are getting some of their electricity from renewable sources such as ridgeline wind turbines, but then sells the rights to the renewable energy claim to other utilities while still telling Vermont customers they are using renewable power.