Playing off posters for Johansson's upcoming comic-book thriller The Spirit, the Environmental Media Association and Lionsgate studio have created PSAs encouraging folks to recycled thier used cell phones. The ads feature one of the movie's taglines, "Answer the call!"
The magazine ads—first appearing in People on Friday—will also include Johansson's costar Eva Mendes.
EMA's goal is to lower the amount of carbon dioxide emissions created by the production of new phones.
This isn't the only good deed Johansson has been up to recently. She just completed a four-day visit to Rwanda, where she visited AIDS clinics with (RED), Bono and Bobby Shriver's initiative to raise money for women and children affected by AIDS in Africa.