ARTIST for ALL SEASONS.

RUFFALO, Mark, 1967-; I Know This Much Is True (TV program); CIANFRANCE, Derek, 1974-; TELEVISION production & direction; TELEVISION producers & directors; ENVIRONMENTAL activism

The article features Mark Ruffalo, star and co-producer of the HBO television series "I Know This Much Is True." It presents his views on working with director-producer Derek Cianfrance on the series. It provides information on the production of the series. It also describes Ruffalo's efforts as a political and environmental activist, including co-founding The Solutions Project, an Oakland, California-based nonprofit organization that advocates for clean energy policies in the U.S.