Ruffalo, who plays the Hulk in the upcoming Avengers movie, was reportedly added to the list after arranging screenings of a documentary about natural gas drilling.
The actor told GQ that his presence on the record was "pretty f**kin' funny".
Ruffalo is an advocate for stopping the practice of natural gas drilling, and organised screenings earlier this year for documentary GasLand, a film that focuses on communities in the United States affected by the practice.
