LOS ANGELES, CA - OCTOBER 23: Actor Mark Ruffalo speaks during the Climate Revolution rally at Levitt Pavilion MacArthur Park on October 23, 2016 in Los Angeles, California. (Photo by Tara Ziemba/WireImage)
LOS ANGELES, CA - OCTOBER 23: Actor Mark Ruffalo speaks during the Climate Revolution rally at Levitt Pavilion MacArthur Park on October 23, 2016 in Los Angeles, California. (Photo by Tara Ziemba/WireImage)