In a field study by Shultz and his colleagues (2007), several households in a neighborhood received weekly feedback about their level of energy consumption relative to their neighbors. How are these results being applied?
a. Neighbors tell each other tips for better energy conservation.
b. Energy companies send out workers to assess energy consumption.
c. Some utility companies now put a smiley or sad face on customers' bills.
d. People are "paying it forward" and teaching others about energy conservation.

The study conducted by Schultz was made to spread awareness among people about their energy consumption, since there is no visible count of how much energy that we use unless we see it in our bills,

The result of the study indicates it is that extremely hard for people to be conscious about how much energy they use on our day to day basis. Most of them surprised about their energy consumption after they receive their feedback.

Using the result of this research, Some utility companies now put a smiley or sad face on customers' bills. Xcel Energy in Minnesota and Commonwealth Edison in Illinois were among those companies.

The smiley face that being put on the bills indicates that the customers were doing a Good job in Energy savings and positively contribute to Environment conservation by reducing energy waste.