It’s like that with our energy bills, too. Eighty-nine percent of us think we’re not using as much energy as we did 5 years ago, and almost one-half of us think our homes are energy efficient. But 59% also say our energy bills have gone up, according to consumer research by the Shelton Group, a marketing and advertising agency that specializes in energy-efficiency issues.

Call that the Snackwell’s effect, says Shelton Group CEO Suzanne Shelton. Basically, we’re saying, “I bought these CFLs so now I can leave the lights on and not pay more. I bought a high-efficiency washer and dryer because I want to do more laundry without paying more. I ate the salad, so I can have the chocolate cake.”